| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Night School (2018) | £1,596,377 | £1,596,377 | £1,596,377 | new | 1 |
| 2 (1) |  | The House With a Clock In Its Walls (2018) | £1,547,626 | £2,150,561 | £5,521,152 | -54% | 2 |
| 3 (2) |  | A Simple Favour (2018) | £1,001,620 | £1,785,325 | £3,407,225 | -38% | 2 |
| 4 (4) |  | Crazy Rich Asians (2018) | £731,157 | £1,244,144 | £4,819,713 | -36% | 3 |
| 5 (5) |  | The Nun (2018) | £659,153 | £1,099,938 | £10,597,539 | -35% | 4 |
| 6 (3) |  | King of Thieves (2018) | £619,529 | £1,239,264 | £4,976,640 | -60% | 3 |
| 7 (new) |  | The Wife (2018) | £392,635 | £392,635 | £392,635 | new | 1 |
| 8 (7) |  | The Predator (2018) | £334,322 | £683,219 | £4,569,791 | -51% | 3 |
| 9 (8) |  | Christopher Robin (2018) | £299,288 | £388,575 | £14,225,959 | -38% | 7 |
| 10 (6) |  | Mile 22 (2018) | £287,226 | £624,980 | £1,420,868 | -64% | 2 |
| 11 (9) |  | Incredibles 2 (2018) | £238,885 | £270,917 | £55,524,993 | -31% | 12 |
| 12 (12) |  | Hotel Transylvania 3: Summer Vacation (2018) | £206,742 | £222,724 | £19,116,195 | -20% | 10 |
| 13 (10) |  | Mamma Mia! Here We Go Again (2018) | £182,377 | £349,672 | £65,222,094 | -44% | 11 |
| 14 (13) |  | BlackKKlansman (2018) | £158,417 | £292,894 | £6,201,281 | -34% | 6 |
| 15 (14) | | Black '47 (2018) | £139,659 | £241,988 | £1,344,288 | -12% | 4 |