| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | The Predator (2018) | £2,394,163 | £2,394,163 | £2,394,163 | new | 1 |
| 2 (1) |  | The Nun (2018) | £1,832,874 | £3,565,376 | £7,663,574 | -55% | 2 |
| 3 (new) |  | Crazy Rich Asians (2018) | £1,599,858 | £1,599,858 | £1,599,858 | new | 1 |
| 4 (new) |  | King of Thieves (2018) | £1,535,876 | £1,535,876 | £1,535,876 | new | 1 |
| 5 (2) |  | Christopher Robin (2018) | £521,842 | £809,493 | £13,178,608 | -41% | 5 |
| 6 (4) |  | Mamma Mia! Here We Go Again (2018) | £487,441 | £985,190 | £64,217,503 | -33% | 9 |
| 7 (3) |  | BlackKKlansman (2018) | £420,883 | £882,212 | £5,414,304 | -47% | 4 |
| 8 (6) |  | Incredibles 2 (2018) | £345,907 | £457,556 | £54,850,305 | -43% | 10 |
| 9 (8) |  | Hotel Transylvania 3: Summer Vacation (2018) | £258,143 | £295,721 | £18,559,767 | -40% | 8 |
| 10 (5) |  | The Meg (2018) | £250,160 | £454,786 | £15,530,578 | -59% | 6 |
| 11 (10) | | Black '47 (2018) | £211,809 | £403,978 | £802,792 | -47% | 2 |
| 12 (11) |  | Mission:Impossible - Fallout (2018) | £143,458 | £302,625 | £24,040,970 | -63% | 8 |
| 13 (9) |  | The Equalizer 2 (2018) | £141,543 | £364,080 | £7,247,966 | -65% | 5 |
| 14 (7) |  | Searching (2018) | £132,187 | £357,078 | £2,023,281 | -70% | 3 |
| 15 (12) |  | Ant-Man and the Wasp (2018) | £132,157 | £245,729 | £17,599,289 | -63% | 7 |