| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Solo: A Star Wars Story (2018) | £6,061,231 | £6,061,231 | £6,061,231 | new | 1 |
| 2 (1) | ![]() | Deadpool 2 (2018) | £3,771,293 | £7,707,910 | £20,682,579 | -71% | 2 |
| 3 (2) | ![]() | Avengers: Infinity War (2018) | £1,215,206 | £2,084,312 | £66,138,820 | -41% | 5 |
| 4 (3) | ![]() | Sherlock Gnomes (2018) | £689,914 | £867,037 | £4,343,619 | -3% | 3 |
| 5 (new) | ![]() | Show Dogs (2018) | £546,405 | £546,405 | £546,405 | new | 1 |
| 6 (4) | ![]() | I Feel Pretty (2018) | £278,748 | £549,387 | £4,467,136 | -32% | 4 |
| 7 (6) | ![]() | Blade Runner (1982) Rerelease | £227,194 | £326,722 | £2,698,172 | 1% | 15 |
| 8 (11) | ![]() | On Chesil Beach (2018) | £170,841 | £221,333 | £288,350 | 61% | 2 |
| 9 (14) | ![]() | Peter Rabbit (2018) | £118,214 | £217,199 | £40,344,166 | 57% | 11 |
| 10 (5) | ![]() | Life of the Party (2018) | £112,995 | £290,055 | £1,409,252 | -50% | 3 |
| 11 (7) | ![]() | Breaking In (2018) | £81,398 | £194,011 | £969,030 | -49% | 3 |
| 12 (new) | The Breadwinner (2018) | £79,329 | £79,329 | £79,329 | new | 1 | |
| 13 (8) | ![]() | A Quiet Place (2018) | £70,675 | £166,926 | £11,801,912 | -44% | 8 |
| 14 (new) | Edie (2018) | £68,555 | £68,555 | £68,555 | new | 1 | |
| 15 (new) | Mckellen Playing the Part Live 2018 (2018) | £41,110 | £41,110 | £41,110 | new | 1 | |