| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Jurassic World: Fallen Kingdom (2018) | £14,334,894 | £14,334,894 | £14,334,894 | new | 1 |
| 2 (1) | ![]() | Solo: A Star Wars Story (2018) | £1,192,220 | £2,483,253 | £16,390,659 | -62% | 3 |
| 3 (2) | ![]() | Deadpool 2 (2018) | £1,182,010 | £2,340,963 | £29,042,739 | -53% | 4 |
| 4 (5) | ![]() | Book Club (2018) | £507,917 | £1,316,747 | £2,037,605 | -30% | 2 |
| 5 (3) | ![]() | Avengers: Infinity War (2018) | £406,119 | £738,773 | £69,563,230 | -62% | 7 |
| 6 (4) | ![]() | Sherlock Gnomes (2018) | £301,555 | £463,865 | £7,580,001 | -68% | 5 |
| 7 (8) | ![]() | Blade Runner (1982) Rerelease | £226,459 | £332,125 | £3,345,126 | 6% | 17 |
| 8 (6) | ![]() | Show Dogs (2018) | £201,435 | £334,592 | £2,549,449 | -67% | 3 |
| 9 (new) | Kaala (2018) | £169,773 | £169,773 | £169,773 | new | 1 | |
| 10 (new) | McQueen (2018) | £131,278 | £131,278 | £131,278 | new | 1 | |
| 11 (new) | ![]() | Coppélia: Bolshoi 2018 (2018) | £96,840 | £96,840 | £96,840 | new | 1 |
| 12 (7) | ![]() | I Feel Pretty (2018) | £96,138 | £189,896 | £5,252,238 | -62% | 6 |
| 13 (9) | Veere Di Wedding (2018) | £92,456 | £168,630 | £380,054 | -56% | 2 | |
| 14 (10) | ![]() | On Chesil Beach (2018) | £51,016 | £163,293 | £786,420 | -61% | 4 |
| 15 (13) | ![]() | Carry On Jatta 2 (2018) | £42,250 | £70,195 | £169,693 | -58% | 2 |
| 16 (12) | ![]() | Peter Rabbit (2018) | £38,887 | £47,352 | £40,672,944 | -61% | 13 |
| 17 (17) | Edie (2018) | £29,293 | £84,340 | £265,975 | -25% | 3 | |
| 18 (19) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £22,762 | £106,616 | £5,731,735 | -39% | 8 |
| 19 (new) | The Boy Downstairs (2018) | £12,823 | £12,823 | £12,823 | new | 1 | |
| 20 (14) | ![]() | 2001: A Space Odyssey (1968) Rerelease | £10,709 | £73,686 | £391,922 | -88% | 32 |
| 21 (41) | ![]() | Early Man (2018) | £8,339 | £9,701 | £11,187,785 | 97% | 20 |
| 22 (20) | ![]() | Lean On Pete (2018) | £5,980 | £13,824 | £361,428 | -43% | 6 |
| 23 (29) | ![]() | Beast (2018) | £4,210 | £9,526 | £409,049 | 28% | 6 |
| 24 (23) | ![]() | Isle of Dogs (2018) | £3,546 | £8,880 | £5,982,811 | -57% | 11 |
| 25 (25) | ![]() | Entebbe (2018) | £2,645 | £8,213 | £298,793 | -63% | 5 |
| 26 (re) | ![]() | An Ideal Husband 2018 (2018) | £2,528 | £2,528 | £357,849 | re | 1 |
| 27 (32) | That Good Night (2018) | £2,429 | £4,553 | £39,901 | 29% | 4 | |
| 28 (22) | ![]() | Bobby Robson More Than a Manager (2018) | £2,320 | £9,598 | £18,485 | -74% | 2 |
| 29 (28) | ![]() | The Bromley Boys (2018) | £2,155 | £4,370 | £7,600 | -33% | 2 |
| 30 (39) | ![]() | Tea With the Dames (2018) | £2,062 | £4,958 | £184,979 | 84% | 5 |
| 31 (31) | An American In Paris: The Musical (2018) | £1,802 | £7,056 | £755,931 | -6% | 4 | |
| 32 (27) | Funny Cow (2018) | £1,467 | £11,139 | £507,296 | -70% | 8 | |
| 33 (new) | Lek and the Dogs (2018) | £1,256 | £1,256 | £1,256 | new | 1 | |
| 34 (new) | Rubb Rakha (2018) | £539 | £539 | £539 | new | 1 | |
| 35 (37) | A Cambodian Spring (2018) | £418 | £1,511 | £11,367 | -9% | 3 | |
| 36 (re) | ![]() | The Mercy (2018) | £284 | £284 | £887,199 | re | 13 |
| 37 (35) | ![]() | Exhibition On Screen: I Claude Monet 2018 (2017) | £225 | £2,218 | £48,367 | -84% | 3 |
| 38 (34) | ![]() | Finding Your Feet (2018) | £221 | £27,273 | £5,752,885 | -87% | 16 |
| 39 (44) | Monster Family (2018) | £215 | £258 | £359,823 | 45% | 15 | |
| 40 (re) | New Town Utopia (2018) | £154 | £154 | £10,414 | re | 5 | |
| 41 (43) | ![]() | You Were Never Really Here (2018) | £129 | £466 | £1,030,583 | -5% | 13 |
| 42 (38) | Mckellen Playing the Part Live 2018 (2018) | £92 | £425 | £43,458 | -74% | 3 | |
| 43 (re) | ![]() | Mary Magdalene (2018) | £38 | £38 | £805,381 | re | 11 |