| | | Reading School | | | | | 308658g | | |
| Abdalla | Madjid | M | The Cedars School | | | 48D | 290053B | | 0 | |
| Abdulla | Murad | M | Scotland | 215C | 2313 | 0 | 291190F | | 2403757 | |
| Abou-Raggah | Yassir | | Fortismere S | 0 | | 0 | 310471A | | 0 | |
| Abraham | Jeff | M | Abingdon School | 0 | 1548 | 0 | 279032E | | 0 | |
| Acharya | Kandara | F | Bristol GS | 116L | 116L | 114L | 302192A | ME008485 | 460702 | |
| Acharya | Dwiti | F | Bristol Juniors | 68D | 1210 | 95C | 308238G | | 489131 | |
| Acmonier | Finn | | Yateley Manor School | | | | | | | |
| Adams | Henry | M | Brighton College | 136B | 1720 | 116A | 302456J | ME006149 | 464562 | |
| Adams | Edward | | Yarm School | 116F | 1570 | 105D | 299153G | | 0 | |
| Adatia | Amar | M | Kent Junior Congresses | 91B | 1383 | 103A | 309402K | | 471976 | |
| Adeniyi | Nathan | | Highgate School | | | | | | | |
| Aderuga | Toby | | St Johns Senior School | | | | | | | |
| Adeweyu | Tonoe | | Nottingham HS | | | | | | | |
| Adhiban | B | | India | 269B | 2718 | 0 | 297148D | | 5018471 | |
| Afolabi | Dami | | St Johns Senior School | | | | | | | |
| Agarwal | Aditi | F | Kent Junior Congresses | 117D | 1578 | | 314932J | ME017161 | 479233 | |
| Agarwal | Aditi | F | Kent Junior Congresses | 117D | 1578 | | 314932J | ME017161 | 479233 | |
| Aggarwal | Romi | | Q Elizabeth H | | 1458 | | 309462F | | 0 | |
| Agnihotri | Aaryan | M | Barnet Knights | 106D | 1495 | 106C | 300583F | | 466166 | |
| Agnihotri | Akaash | M | Barnet Knights | 106D | 1495 | 117B | 300584H | | 466174 | |
| Agrawal | Shivam | M | Kings College Junior School (Wimbledon) | 167A | 1963 | 151A | 306605J | ME014479 | 460460 | |
| Agrawal | Ansh | M | King Edwards School Birmingham | 101D | 1458 | 127D | 309585L | | 473634 | |
| Ahad | Monaf | M | Scotland | | | | 318485H | | 0 | |
| Ahi | Josya | | Tormead Girls School | | | | | | | |
| Ahluwalia | Amardip | M | RGS Guildford | 205B | 2238 | 190B | 287750J | ME000967 | 437085 | |
| Ahmed | Bilal | M | Q Elizabeth H | 137A | 1728 | 131A | 318794K | ME017444 | 0 | |
| Ainkaran | Lavanan | M | King Edward VI School Chelmsford | 130D | 1675 | | 297350K | | 457116 | |
| Ainsworth | William J | M | Reigate GS | 86B | 1339 | 61E | 306943G | ME016356 | 455474 | |
| Akash Pc | Iyer | M | India | | 2538 | 0 | 314526J | | 5006775 | |
| Akella | Aditya | M | Wilsons School | 0 | | 77A | 320929F | ME020504 | 481718 | |
| Akeya-Price | Robert A | M | Trinity School | 181A | 2056 | 173A | 287093K | ME013488 | 430510 | |
| Akshat | Khamparia | M | India | | 2425 | 0 | 322539C | | 5016541 | |
| Aktselis | Filippos | M | Kent Junior Congresses | 0 | | 58C | 319394K | | 474975 | |
| Aktselis | Filippos | M | Kent Junior Congresses | 0 | | 58C | 319394K | | 474975 | |
| Al-Naimi | Yousif | M | Kings College School (Wimbledon) | 0 | | 58E | 301753K | | 0 | |
| Al-Robaie | Karam | M | Skinners School | 0 | 1218 | | 304682F | | 0 | |
| Aldridge | Julian | M | Winchester College | | | | | | | |
| Alexander | Sonny | | Yateley Manor School | | | | | | | |
| Alexander | Sonny | | Yateley Manor School | | | | | | | |
| Alexandre-Epivent | Virgile | M | Kings College Junior School (Wimbledon) | | 1158 | | 311569A | | 0 | |
| Alford | Sam | | RGS Guildford | | | 112D | 322355D | | 0 | |
| Alfred | Daren | M | Wilsons School | 0 | 1375 | 0 | 288259A | | 0 | |
| Ali | Shahvez | M | Kings College Junior School (Wimbledon) | 143C | 1773 | 137A | 302390E | ME014400 | 453790 | |
| Ali | Hassan | M | Reigate GS | 0 | 1315 | 0 | 304169E | | 0 | |
| Ali | Adam | M | Wilsons School | | | 106D | 305362D | ME022827 | 0 | |
| Ali | Shahyan | M | Kings College Junior School (Wimbledon) | 77E | 1278 | 92A | 312325L | ME014401 | 459402 | |
| Ali Hussain | Iskander | M | London | 74L | 74L | 66L | 311625G | | 0 | |
| Alker | Steven | | Horsham | 0 | 1278 | 0 | 300286L | | 0 | |
| Alkhusheh | Alhumam | M | Reigate GS | | 1300 | 0 | 293957F | | 0 | |
