| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (3) |  | A Star Is Born (2018) | £3,083,089 | £5,495,474 | £9,595,670 | -25% | 2 |
| 2 (1) |  | Venom (2018) | £3,002,032 | £5,698,475 | £13,729,817 | -63% | 2 |
| 3 (2) |  | Johnny English Strikes Again (2018) | £2,900,426 | £4,199,510 | £8,317,202 | -30% | 2 |
| 4 (new) |  | First Man (2018) | £2,415,330 | £2,415,330 | £2,415,330 | new | 1 |
| 5 (new) |  | Smallfoot (2018) | £2,324,189 | £2,324,189 | £2,324,189 | new | 1 |
| 6 (new) |  | Cliff Richard Live 60th Anniversary Tour (2018) | £1,123,885 | £1,123,885 | £1,123,885 | new | 1 |
| 7 (new) |  | Kler (2018) | £1,006,141 | £1,006,141 | £1,006,141 | new | 1 |
| 8 (new) |  | Bad Times At the El Royale (2018) | £491,878 | £491,878 | £491,878 | new | 1 |
| 9 (4) |  | The House With a Clock In Its Walls (2018) | £399,028 | £601,620 | £7,408,371 | -56% | 4 |
| 10 (5) |  | Night School (2018) | £357,617 | £705,709 | £3,828,627 | -58% | 3 |
| 11 (6) |  | A Simple Favour (2018) | £153,247 | £455,115 | £4,930,383 | -68% | 4 |
| 12 (11) |  | Incredibles 2 (2018) | £148,988 | £159,713 | £55,924,175 | -32% | 14 |
| 13 (10) |  | The Wife (2018) | £114,329 | £308,841 | £1,232,864 | -50% | 3 |
| 14 (8) |  | Crazy Rich Asians (2018) | £93,833 | £220,953 | £5,624,525 | -67% | 5 |
| 15 (9) |  | The Nun (2018) | £85,081 | £202,436 | £11,302,155 | -65% | 6 |