| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Ocean's 8 () | £4,347,070 | £4,347,070 | £4,347,070 | new | 1 |
| 2 (1) | ![]() | Jurassic World: Fallen Kingdom () | £3,249,227 | £5,633,718 | £31,205,563 | -55% | 3 |
| 3 (2) | ![]() | Hereditary () | £834,527 | £1,794,533 | £3,658,446 | -55% | 2 |
| 4 (4) | ![]() | Deadpool 2 () | £454,656 | £906,315 | £31,525,696 | -48% | 6 |
| 5 (3) | ![]() | Solo: A Star Wars Story (2018) | £375,488 | £720,533 | £18,709,126 | -61% | 5 |
| 6 (7) | ![]() | Avengers: Infinity War () | £184,451 | £290,800 | £70,459,199 | -55% | 9 |
| 7 (8) | ![]() | Sherlock Gnomes () | £178,500 | £223,003 | £8,268,657 | -56% | 7 |
| 8 (6) | ![]() | Book Club () | £163,850 | £533,140 | £3,661,322 | -60% | 4 |
| 9 (11) | ![]() | The Happy Prince () | £151,355 | £210,862 | £318,040 | 29% | 2 |
| 10 (10) | ![]() | Blade Runner (1982) Rerelease | £127,840 | £365,759 | £4,158,135 | -23% | 19 |
| 11 (5) | ![]() | Race 3 (2018) | £113,846 | £295,216 | £1,078,167 | -85% | 2 |
| 12 (9) | ![]() | Show Dogs (2018) | £96,699 | £123,123 | £2,943,950 | -57% | 5 |
| 13 (13) | McQueen () | £43,452 | £123,199 | £463,163 | -56% | 3 | |
| 14 (re) | Veere Di Wedding (2018) | £32,327 | £32,327 | £531,307 | re | 3 | |
| 15 (new) | In the Fade () | £25,963 | £25,963 | £25,963 | new | 1 | |
| 16 (new) | ![]() | Overboard () | £19,304 | £19,304 | £19,304 | new | 1 |
| 17 (16) | ![]() | Peter Rabbit (2018) | £11,700 | £130,184 | £40,914,878 | -67% | 15 |
| 18 (new) | Tik Tik Tik () | £11,166 | £11,166 | £11,166 | new | 1 | |
| 19 (new) | Arcadia (2018) | £10,732 | £10,732 | £10,732 | new | 1 | |
| 20 (18) | ![]() | On Chesil Beach () | £9,598 | £51,467 | £934,636 | -65% | 6 |
| 21 (20) | Edie (2018) | £7,290 | £34,525 | £371,105 | -62% | 5 | |
| 22 (new) | Boom For Real: The Late Teenage Years of Jean Michel Basquiat () | £2,450 | £2,450 | £2,450 | new | 1 | |
| 23 (22) | ![]() | 2001: A Space Odyssey () Rerelease | £2,108 | £2,108 | £405,169 | -81% | 34 |
| 24 (29) | That Good Night () | £2,079 | £5,631 | £53,257 | -8% | 6 | |
| 25 (new) | Abrahams Santhathikal () | £2,061 | £2,061 | £2,061 | new | 1 | |
| 26 (26) | ![]() | Isle of Dogs (2018) | £1,888 | £3,673 | £5,996,019 | -69% | 13 |
| 27 (21) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £1,879 | £35,748 | £5,812,090 | -85% | 10 |
| 28 (new) | ![]() | Kissing Candice () | £1,687 | £1,687 | £1,687 | new | 1 |
| 29 (re) | Madama Butterfly: Glyndebourne 2018 (2018) | £1,683 | £1,683 | £95,055 | re | 1 | |
| 30 (32) | Funny Cow () | £894 | £4,577 | £518,799 | -18% | 10 | |
| 31 (re) | ![]() | Finding Your Feet (2018) | £754 | £754 | £5,776,700 | re | 17 |
| 32 (new) | Freak Show (2018) | £724 | £724 | £724 | new | 1 | |
| 33 (27) | ![]() | Lean On Pete () | £682 | £6,396 | £381,755 | -88% | 8 |
| 34 (28) | ![]() | Entebbe (2018) | £634 | £3,279 | £309,301 | -83% | 7 |
| 35 (re) | ![]() | Exhibition On Screen: I Claude Monet 2018 () | £581 | £581 | £50,292 | re | 4 |
| 36 (30) | An American In Paris: The Musical (2018) | £548 | £3,602 | £766,832 | -70% | 6 | |
| 37 (39) | Stanley a Man of Variety (2018) | £493 | £848 | £1,287 | 11% | 2 | |
| 38 (38) | ![]() | Beast () | £492 | £690 | £414,028 | -5% | 8 |
| 39 (37) | ![]() | Tea With the Dames () | £402 | £2,362 | £190,860 | -25% | 7 |
| 40 (31) | ![]() | Bobby Robson More Than a Manager () | £387 | £1,088 | £25,154 | -78% | 4 |
| 41 (44) | Monster Family (2018) | £387 | £443 | £360,546 | 41% | 17 | |
| 42 (35) | Mckellen Playing the Part Live 2018 () | £210 | £1,767 | £45,951 | -66% | 5 | |
| 43 (14) | Swan Lake: ROH London 2017/18 () | £199 | £25,812 | £859,215 | -100% | 2 | |
| 44 (36) | ![]() | The Bromley Boys (2018) | £190 | £2,070 | £11,700 | -69% | 4 |
| 45 (24) | ![]() | Early Man () | £158 | £782 | £11,198,655 | -98% | 22 |
| 46 (41) | ![]() | You Were Never Really Here () | £101 | £403 | £1,031,989 | -75% | 15 |
| 47 (40) | A Cambodian Spring (2018) | £77 | £624 | £13,392 | -82% | 5 | |
| 48 (48) | ![]() | Paddington 2 (2017) | £72 | £72 | £42,642,938 | 72% | 31 |
| 49 (33) | Lek and the Dogs () | £65 | £335 | £3,593 | -92% | 3 | |