Numbers of animals
| Year | Number of animals used in research at Imperial |
|---|---|
| 2023 | 68,135 |
| 2022 | 71,406 |
| 2021 | 87,403 |
| 2020 | 72,823 |
| 2019 | 99,295 |
| 2018 | 102,497 |
| 2017 | 97,787 |
| 2016 | 01,369 |
| 2015 | 101,179 |
| 2014 | 111,874 |
| 2013 | 130,358 |
| 2012 | 123,547 |
| 2011 | 106,772 |
| 2010 | 139,725 |
| 2009 | 125,566 |
| 2008 | 115,282 |
Types of animals used in 2023
| Type of animal | Number | Percentage |
| Mice | 63646 | 93.41 |
| Fish | 1674 | 2.46 |
| Rats | 1709 | 2.51 |
| Birds | 25 | 0.04 |
| Guinea pigs | 799 | 1.17 |
| Rabbits | 42 | 0.06 |
| Hamsters | 240 | 0.35 |
Breakdown of the number of procedures by year using the different classifications of procedure as defined by the Home Office
Home Office statistics of scientific procedures on living animals: user guide
| Mouse | Zebrafish | Rat | Bird | Guinea-pig | Rabbit | Hamsters | Total | |
| Severity | ||||||||
| Sub-threshold | 19161 | 0 | 36 | 0 | 0 | 0 | 0 | 19197 |
| Mild | 20604 | 1496 | 311 | 25 | 6 | 0 | 240 | 22682 |
| Moderate | 15676 | 0 | 616 | 0 | 621 | 0 | 0 | 16913 |
| Severe | 1091 | 0 | 7 | 0 | 0 | 0 | 0 | 1098 |
| Non-recovery | 524 | 0 | 144 | 0 | 0 | 22 | 0 | 690 |
| Total | ||||||||
| Total number of scientific procedures carried out under project licence authority | 57056 | 1496 | 1114 | 25.00 | 627 | 22 | 240 | 60580 |
| Total number of animals used under project licence authority | 57056 | 1496 | 1114 | 25.00 | 627 | 22 | 240 | 60580 |
| Animals used for breeding or tissue collection purposes | 6590 | 178 | 595 | 0.00 | 172 | 20 | 0 | 7555 |
| Total numbers | 63646 | 1674 | 1709 | 25 | 799 | 42 | 240 | 68135 |
Total Number of animals bred on site in 2023
| mice | zebrafish | rats | |
| 45906 | 1836 | 520 | |
Types of animals used in:
2022
Types of animals used in 2022
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 65344 | 91.51% |
| Fish | 2584 | 3.62% |
| Rats | 1860 | 2.6% |
| Birds | 196 | 0.27% |
| Guinea-pigs | 1212 | 1.7% |
| Rabbits | 46 | 0.06% |
| Hamsters | 164 | 0.23% |
Breakdown of the number of procedures by year using the different classifications of procedure as defined by the Home Office
Home Office statistics of scientific procedures on living animals: user guide
| Mouse | Zebrafish | Rat | Bird | Guinea-pig | Rabbit | Hamsters | Total | |
| Severity | ||||||||
| Sub threshold | 15943 | 1786 | 22 | 0 | 0 | 0 | 0 | 17751 |
| Mild | 24551 | 85 | 438 | 196 | 25 | 0 | 158 | 25453 |
| Moderate | 14409 | 429 | 463 | 0 | 548 | 0 | 3 | 15852 |
| Severe | 588 | 2 | 1 | 0 | 1 | 0 | 3 | 595 |
| Non-recovery | 1006 | 0 | 231 | 0 | 0 | 16 | 0 | 1253 |
| Total | ||||||||
| Total number of scientific procedures carried out under project licence authority | 56497 | 2302 | 1155 | 196 | 574 | 16 | 164 | 60904 |
| Total number of animals used under project licence authority | 56497 | 2302 | 1155 | 196 | 574 | 16 | 164 | 60904 |
| Animals used for breeding or tissue collection purposes | 8847 | 282 | 705 | 0 | 638 | 30 | 0 | 10502 |
| Total numbers | 65344 | 2584 | 1860 | 196 | 1212 | 46 | 164 | 71406 |
2021
Types of animals used in 2021
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 77527 | 88.7% |
| Fish | 5959 | 6.82% |
| Rats | 2648 | 3.03% |
| Birds | 239 | 0.27% |
| Guinea-pigs | 809 | 0.93% |
| Ferrets | 14 | 0.02% |
| Rabbits | 24 | 0.03% |
| Hamsters | 183 | 0.21% |
Breakdown of the number of procedures by year using the different classifications of procedure as defined by the Home Office
Home Office statistics of scientific procedures on living animals: user guide
| Mouse | Zebrafish | Rat | Bird | Guinea-pig | Ferret | Rabbit | Hamsters | Total | |
| Severity | |||||||||
| Sub threshold | 18516 | 4079 | 0 | 0 | 0 | 7 | 0 | 0 | 22602 |
| Mild | 32482 | 1262 | 552 | 239 | 50 | 7 | 6 | 107 | 34705 |
| Moderate | 14969 | 184 | 961 | 0 | 585 | 0 | 0 | 73 | 16772 |
| Severe | 510 | 0 | 1 | 0 | 0 | 0 | 0 | 3 | 514 |
| Non-recovery | 1608 | 3 | 117 | 0 | 0 | 0 | 4 | 0 | 1732 |
| Total | |||||||||
| Total number of scientific procedures carried out under project licence authority | 68085 | 5528 | 1631 | 239 | 635 | 14 | 10 | 183 | 76325 |
| Total number of animals used under project licence authority | 68085 | 5528 | 1631 | 239 | 635 | 14 | 10 | 183 | 76325 |
| Animals used for breeding or tissue collection purposes | 9442 | 431 | 1017 | 0 | 174 | 0 | 14 | 0 | 11078 |
| Total numbers | 77527 | 5959 | 2648 | 239 | 809 | 14 | 24 | 183 | 87403 |
2020
Types of animals used in 2020
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 64628 | 88.75% |
| Fish | 3857 | 5.3% |
| Rats | 3011 | 4.13% |
| Birds | 175 | 0.24% |
| Guinea-pigs | 1054 | 1.45% |
| Ferrets | 67 | 0.09% |
| Rabbits | 31 | 0.04% |
Breakdown of the number of procedures by year using the different classifications of procedure as defined by the Home Office
Home Office statistics of scientific procedures on living animals: user guide
| Mouse | Zebrafish | Rat | Bird | Guinea-pig | Ferret | Rabbit | Total | |
| Severity | ||||||||
| Sub threshold | 17110 | 843 | 0 | 0 | 0 | 0 | 0 | 17953 |
| Mild | 24395 | 1348 | 811 | 175 | 502 | 67 | 15 | 27313 |
| Moderate | 12590 | 195 | 1079 | 0 | 337 | 0 | 10 | 14211 |
| Severe | 1089 | 6 | 6 | 0 | 0 | 0 | 0 | 1101 |
| Non-recovery | 1699 | 1170 | 210 | 0 | 13 | 0 | 0 | 3092 |
| Total | ||||||||
| Total number of scientific procedures carried out under project licence authority | 56883 | 3562 | 2106 | 175 | 852 | 67 | 25 | 63670 |
| Total number of animals used under project licence authority | 56883 | 3562 | 2106 | 175 | 852 | 67 | 25 | 63670 |
| Animals used for breeding or tissue collection purposes | 7745 | 295 | 905 | 0 | 202 | 0 | 6 | 9153 |
| Total numbers | 64628 | 3857 | 3011 | 175 | 1054 | 67 | 31 | 72823 |
2019
Types of animals used in 2019
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 87,202 | 87.82% |
| Fish | 6,100 | 6.14% |
| Rats | 4,745 | 4.78% |
| Birds | 713 | 0.72% |
| Guinea-pigs | 414 | 0.42% |
| Ferrets | 65 | 0.07% |
| Rabbits | 52 | 0.05% |
| Amphibians | 4 | 0.004% |
Breakdown of the number of procedures by year using the different classifications of procedure as defined by the Home Office
Home Office statistics of scientific procedures on living animals: user guide
| Mouse | Zebrafish | Rat | Bird | Guinea-pig | Ferret | Rabbit | Amphibian | Total | |
| Severity | |||||||||
| Sub threshold | 23,468 | 1,596 | 0 | 0 | 0 | 0 | 0 | 0 | 25,064 |
| Mild | 29,351 | 1,271 | 906 | 713 | 0 | 65 | 15 | 0 | 32,321 |
| Moderate | 14,424 | 1,913 | 2161 | 0 | 227 | 0 | 23 | 0 | 18,748 |
| Severe | 702 | 0 | 9 | 0 | 0 | 0 | 0 | 4 | 715 |
| Non-recovery | 2,480 | 1,257 | 173 | 0 | 31 | 0 | 10 | 0 | 3,951 |
| Total | |||||||||
| Total number of scientific procedures carried out under project licence authority | 70,425 | 6,037 | 3,249 | 713 | 258 | 65 | 48 | 4 | 80,799 |
| Total number of animals used under project licence authority | 70,425 | 6,037 | 3,249 | 713 | 258 | 65 | 48 | 4 | 80,799 |
| Animals used for breeding or tissue collection purposes | 16,777 | 63 | 1,496 | 0 | 156 | 0 | 4 | 0 | 18,496 |
| Total numbers | 87,202 | 6,100 | 4,745 | 713 | 414 | 65 | 52 | 4 | 99,295 |
2018
Types of animals used in 2018
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 89956 | 87.76% |
| Rats | 4958 | 4.84% |
| Fish | 6898 | 6.73% |
| Guinea-pigs | 307 | 0.3% |
| Birds | 177 | 0.17% |
| Rabbits | 144 | 0.14% |
| Ferrets | 57 | 0.06% |
Breakdown of the number of procedures by year using the different classifications of procedure as defined by the Home Office
Home Office statistics of scientific procedures on living animals: user guide
| Zebrafish | Mouse | Rat | Guinea-pig | Rabbit | Ferret | Bird | ||
| Severity | ||||||||
| Sub threshold | 3726 | 18460 | 180 | 0 | 0 | 0 | 0 | 22366 |
| Mild | 1149 | 39252 | 980 | 44 | 0 | 42 | 177 | 41644 |
| Moderate | 956 | 13289 | 2784 | 150 | 43 | 13 | 0 | 17235 |
| Severe | 92 | 1126 | 36 | 2 | 0 | 0 | 0 | 1256 |
| Non-recovery | 830 | 2067 | 259 | 33 | 82 | 0 | 0 | 3271 |
| Total | ||||||||
| Total number of scientific procedures carried out under project licence authority | 6753 | 74194 | 4239 | 229 | 125 | 55 | 177 | 85772 |
| Total number of animals used under project licence authority | 6753 | 74190 | 4239 | 229 | 125 | 55 | 177 | 85768 |
| Animals used for breeding or tissue collection purposes | 145 | 15766 | 719 | 78 | 19 | 2 | 0 | 16729 |
| Total numbers | 6898 | 89956 | 4958 | 307 | 144 | 57 | 177 | 102497 |
2017
Types of animals used in 2017
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 88024 | 90.01% |
| Rats | 4487 | 4.58% |
| Fish | 4653 | 4.75% |
| Guinea-pigs | 383 | 0.39% |
| Birds | 144 | 0.14% |
| Rabbits | 86 | 0.08% |
| Ferrets | 10 | 0.01% |
Breakdown of the number of procedures in 2017 using the different classifications of procedure as defined by the Home Office
User Guide to Annual Home Office Statistics of Scientific Procedures on Living Animals Great Britain (pdf)
| Zebrafish | Mouse | Rat | Guinea-pig | Rabbit | Ferret | Bird | ||
| Severity | ||||||||
| Sub threshold | 1,544 | 18,784 | 349 | 0 | 0 | 0 | 0 | 20,677 |
| Mild | 1,617 | 35,490 | 351 | 34 | 2 | 10 | 111 | 37,615 |
| Moderate | 798 | 13,483 | 2,863 | 197 | 10 | 0 | 0 | 17,351 |
| Severe | 35 | 513 | 42 | 2 | 2 | 0 | 0 | 594 |
| Non-recovery | 126 | 2,621 | 408 | 47 | 53 | 0 | 0 | 3,255 |
| Total | ||||||||
| Total number of scientific procedures carried out under project licence authority | 4,120 | 70,891 | 4,013 | 280 | 67 | 10 | 111 | 79,492 |
| Total number of animals used under project licence authority | 4,120 | 70,891 | 4,013 | 280 | 67 | 10 | 111 | 79,492 |
| Animals used for breeding or tissue collection purposes | 533 | 17,133 | 474 | 103 | 19 | 0 | 33 | 18,295 |
| Total numbers | 4,653 | 88,024 | 4,487 | 383 | 86 | 10 | 144 | 97,787 |
2016
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 87,389 | 86.21% |
| Rats | 6,403 | 6.32% |
| Fish | 6,304 | 6.22% |
| Guinea-pigs | 531 | 0.52% |
| Birds | 509 | 0.50% |
| Amphibians | 146 | 0.14% |
| Rabbits | 72 | 0.07% |
| Ferrets | 15 | 0.01% |
Breakdown of the number of procedures in 2016 using the different classifications of procedure as defined by the Home Office
User Guide to Annual Home Office Statistics of Scientific Procedures on Living Animals Great Britain (pdf)
| Zebrafish | Mouse | Rat | Guinea-pig | Rabbit | Ferret | Bird | Amphibian | ||
| Severity | |||||||||
| Sub threshold | 2,702 | 23,480 | 1,078 | 0 | 0 | 0 | 0 | 0 | |
| Mild | 931 | 34,550 | 507 | 55 | 3 | 11 | 506 | 0 | |
| Moderate | 2,176 | 18,078 | 3,499 | 306 | 17 | 2 | 0 | 0 | |
| Severe | 325 | 174 | 48 | 1 | 1 | 2 | 0 | 146 | |
| Non-recovery | 23 | 2,476 | 388 | 40 | 45 | 0 | 0 | 0 | |
| Total | |||||||||
| Total number of scientific procedures carried out under project licence authority | 6,157 | 78,758 | 5,520 | 402 | 66 | 15 | 506 | 146 | 91,570 |
| Total number of animals used under project licence authority | 6,157 | 78,758 | 5,520 | 402 | 66 | 15 | 506 | 146 | 91,570 |
| Animals used for breeding or tissue collection purposes | 147 | 8,631 | 883 | 129 | 6 | 0 | 3 | 0 | 9,799 |
| Total numbers | 6,304 | 87,389 | 6,403 | 531 | 72 | 15 | 509 | 146 | 101,369 |
2015
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 84,238 | 83.26% |
| Fish | 10,477 | 10.35% |
| Rats | 5,927 | 5.86% |
| Guinea-pigs | 266 | 0.26% |
| Rabbits | 213 | 0.21% |
| Amphibians | 42 | 0.04% |
| Ferrets | 16 | 0.02% |
2014
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 93,543 | 83.61% |
| Fish | 10,685 | 9.55% |
| Rats | 6,853 | 6.13% |
| Guinea-pigs | 256 | 0.23% |
| Other rodents | 252 | 0.23% |
| Rabbits | 209 | 0.19% |
| Amphibians | 56 | 0.05% |
| Ferrets | 20 | 0.02% |
2013
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 117,707 | 90.29% |
| Rats | 8,356 | 6.41% |
| Fish | 3,287 | 2.53% |
| Birds | 536 | 0.41% |
| Guinea-pigs | 252 | 0.19% |
| Rabbits | 140 | 0.11% |
| Ferrets | 36 | 0.03% |
| Other rodents | 44 | 0.03% |
2012
| Type of animal | Number | Percentage |
|---|---|---|
| Mice | 112,620 | 91.15% |
| Rats | 8,852 | 7.16% |
| Fish | 916 | 0.74% |
| Guinea-pigs | 602 | 0.49% |
| Amphibians | 303 | 0.25% |
| Rabbits | 220 | 0.18% |
| Ferrets | 28 | 0.02% |
| Pigs | 6 | 0.01% |
These figures are provided each year to the Home Office, which publishes annual statistics on the use of animals in scientific research in Great Britain.