| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Avengers: Infinity War (2018) | £10,143,580 | £22,520,504 | £51,900,000 | -65% | 2 |
| 2 (new) | ![]() | I Feel Pretty (2018) | £1,272,154 | £1,272,154 | £1,272,154 | new | 1 |
| 3 (3) | ![]() | A Quiet Place (2018) | £395,335 | £902,621 | £10,773,694 | -57% | 5 |
| 4 (2) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £357,429 | £1,259,141 | £4,293,764 | -63% | 3 |
| 5 (4) | ![]() | Rampage (2018) | £256,219 | £506,207 | £8,323,117 | -65% | 4 |
| 6 (8) | ![]() | Blade Runner (1982) Rerelease | £231,271 | £337,819 | £1,698,261 | 3% | 12 |
| 7 (new) | The Strangers: Prey At Night (2018) | £205,325 | £205,325 | £205,325 | new | 1 | |
| 8 (new) | ![]() | Tully (2018) | £138,674 | £138,674 | £138,674 | new | 1 |
| 9 (5) | ![]() | Peter Rabbit (2018) | £120,181 | £215,864 | £39,850,737 | -79% | 8 |
| 10 (new) | Mary and the Witch's Flower (2018) | £119,129 | £119,129 | £119,129 | new | 1 | |
| 11 (6) | ![]() | The Greatest Showman (2017) | £90,458 | £234,489 | £46,208,734 | -70% | 19 |
| 12 (new) | ![]() | Lean On Pete (2018) | £85,597 | £85,597 | £85,597 | new | 1 |
| 13 (11) | ![]() | Black Panther (2018) | £74,561 | £174,012 | £50,379,585 | -60% | 12 |
| 14 (7) | ![]() | Truth Or Dare (2018) | £70,624 | £206,871 | £2,400,490 | -71% | 4 |
| 15 (new) | ![]() | Bride and Groom (2018) | £70,196 | £70,196 | £70,196 | new | 1 |
| 16 (new) | ![]() | 102 Not Out (2018) | £68,302 | £68,302 | £68,302 | new | 1 |
| 17 (10) | ![]() | Ready Player One (2018) | £37,887 | £130,194 | £16,014,254 | -81% | 6 |
| 18 (15) | ![]() | Isle of Dogs (2018) | £34,596 | £93,233 | £5,828,279 | -71% | 6 |
| 19 (12) | ![]() | Beast (2018) | £33,326 | £121,729 | £288,024 | -80% | 2 |
| 20 (16) | Funny Cow (2018) | £29,698 | £99,196 | £346,498 | -68% | 3 | |
| 21 (re) | Manon: ROH London 2017/18 (2018) | £24,844 | £24,844 | £391,670 | re | 1 | |
| 22 (new) | ![]() | Daana Paani (2018) | £16,529 | £16,529 | £16,529 | new | 1 |
| 23 (18) | ![]() | Bing At the Cinema (2018) | £13,587 | £27,551 | £93,086 | -79% | 2 |
| 24 (19) | ![]() | Early Man (2018) | £6,533 | £8,118 | £11,152,701 | -78% | 15 |
| 25 (20) | ![]() | Ghost Stories (2018) | £6,432 | £31,643 | £1,612,892 | -78% | 5 |
| 26 (re) | Nothing Like a Dame (2018) | £5,600 | £5,600 | £114,848 | re | 1 | |
| 27 (new) | ![]() | A Or B (2018) | £5,446 | £5,446 | £5,446 | new | 1 |
| 28 (29) | ![]() | Three Billboards Outside Ebbing, Missouri (2018) | £4,815 | £18,402 | £15,172,603 | 30% | 17 |
| 29 (21) | The Delinquent Season (2018) | £2,900 | £10,567 | £22,137 | -75% | 2 | |
| 30 (33) | ![]() | Red Sparrow (2018) | £2,461 | £3,618 | £6,394,076 | 3% | 10 |
| 31 (new) | ![]() | Modern Life Is Rubbish (2018) | £2,432 | £2,432 | £2,432 | new | 1 |
| 32 (new) | New Town Utopia (2018) | £2,049 | £2,049 | £2,049 | new | 1 | |
| 33 (re) | Young Marx: NT Live 2017 (2017) | £2,002 | £2,002 | £488,660 | re | 6 | |
| 34 (23) | ![]() | Finding Your Feet (2018) | £1,660 | £20,827 | £5,681,478 | -78% | 11 |
| 35 (re) | My Generation (2018) | £1,646 | £1,646 | £286,099 | re | 7 | |
| 36 (43) | ![]() | Lady Windermere's Fan 2018 (2018) | £1,565 | £1,642 | £443,422 | 75% | 4 |
| 37 (35) | Westwood: Punk, Icon, Activist (2018) | £1,437 | £3,362 | £130,593 | -35% | 7 | |
| 38 (24) | ![]() | Macbeth: RSC Live 2018 (2018) | £1,307 | £5,973 | £639,915 | -80% | 4 |
| 39 (34) | ![]() | Mary Magdalene (2018) | £1,197 | £4,979 | £800,030 | -47% | 8 |
| 40 (25) | ![]() | You Were Never Really Here (2018) | £1,177 | £7,436 | £1,021,022 | -76% | 9 |
| 41 (45) | ![]() | Star Wars: The Last Jedi (2017) | £844 | £-17,090 | £82,659,680 | 75% | 17 |
| 42 (re) | ![]() | Journeys End (2018) | £578 | £578 | £518,723 | re | 13 |
| 43 (31) | ![]() | Journeyman (2018) | £543 | £3,470 | £121,551 | -83% | 6 |
| 44 (new) | Kammara Sambavam (2018) | £540 | £540 | £540 | new | 1 | |
| 45 (42) | Julius Caesar: NT Live 2018 (2018) | £530 | £1,555 | £635,408 | 11% | 7 | |
| 46 (37) | Monster Family (2018) | £505 | £567 | £357,111 | -53% | 10 | |
| 47 (new) | Mayurakshi (2017) | £436 | £436 | £436 | new | 1 | |
| 48 (48) | The Islands and the Whales (2018) | £234 | £400 | £11,784 | 50% | 5 | |
| 49 (44) | Even When I Fall (2018) | £170 | £497 | £21,262 | -50% | 3 | |
| 50 (40) | Walk Like a Panther (2018) | £153 | £1,354 | £205,751 | -69% | 9 | |
| 51 (38) | ![]() | Darkest Hour (2018) | £130 | £4,018 | £24,095,409 | -87% | 17 |
| 52 (32) | Another News Story (2018) | £127 | £127 | £3,196 | -96% | 2 | |
| 53 (36) | ![]() | Pacific Rim Uprising (2018) | £121 | £3,298 | £4,414,344 | -94% | 7 |
| 54 (re) | Exhibition On Screen: Cézanne 2018 (2018) | £106 | £106 | £131,638 | re | 5 | |
| 55 (re) | Wind In the Willows: The Musical (2018) | £89 | £89 | £78,097 | re | 5 | |
| 56 (re) | Psycho Vertical (2018) | £77 | £77 | £7,713 | re | 6 | |
| 57 (27) | ![]() | Tomb Raider (2018) | £60 | £4,565 | £7,735,987 | -99% | 8 |
| 58 (49) | ![]() | Paddington 2 (2017) | £12 | £424 | £42,641,736 | -90% | 26 |