| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Avengers: Infinity War (2018) | £5,706,170 | £8,453,842 | £60,353,842 | -44% | 3 |
| 2 (new) | ![]() | Sherlock Gnomes (2018) | £2,522,342 | £2,522,342 | £2,522,342 | new | 1 |
| 3 (2) | ![]() | I Feel Pretty (2018) | £931,614 | £1,825,066 | £3,097,220 | -27% | 2 |
| 4 (new) | ![]() | Life of the Party (2018) | £618,311 | £618,311 | £618,311 | new | 1 |
| 5 (new) | ![]() | Breaking In (2018) | £424,675 | £424,675 | £424,675 | new | 1 |
| 6 (3) | ![]() | A Quiet Place (2018) | £361,029 | £628,440 | £11,402,134 | -9% | 6 |
| 7 (4) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £305,925 | £709,276 | £5,003,040 | -14% | 4 |
| 8 (6) | ![]() | Blade Runner (1982) Rerelease | £230,016 | £337,382 | £2,035,643 | -1% | 13 |
| 9 (5) | ![]() | Rampage (2018) | £189,221 | £372,605 | £8,695,722 | -26% | 5 |
| 10 (new) | Raazi (2018) | £150,359 | £150,359 | £150,359 | new | 1 | |
| 11 (new) | ![]() | Entebbe (2018) | £138,390 | £138,390 | £138,390 | new | 1 |
| 12 (9) | ![]() | Peter Rabbit (2018) | £115,336 | £213,456 | £40,064,193 | -4% | 9 |
| 13 (8) | ![]() | Tully (2018) | £113,519 | £262,199 | £400,873 | -18% | 2 |
| 14 (11) | ![]() | The Greatest Showman (2017) | £90,376 | £200,651 | £46,409,385 | 0% | 20 |
| 15 (7) | The Strangers: Prey At Night (2018) | £86,702 | £225,893 | £431,218 | -58% | 2 | |
| 16 (12) | ![]() | Lean On Pete (2018) | £55,752 | £111,389 | £196,986 | -35% | 2 |
| 17 (new) | Redoubtable (2018) | £39,043 | £39,043 | £39,043 | new | 1 | |
| 18 (18) | ![]() | Isle of Dogs (2018) | £37,258 | £76,979 | £5,905,258 | 7% | 7 |
| 19 (new) | Mahanati (2018) | £35,877 | £35,877 | £35,877 | new | 1 | |
| 20 (17) | ![]() | Ready Player One (2018) | £33,283 | £67,703 | £16,081,957 | -12% | 7 |
| 21 (new) | Revenge (2018) | £27,231 | £27,231 | £27,231 | new | 1 | |
| 22 (20) | Funny Cow (2018) | £26,011 | £63,191 | £409,689 | -12% | 4 | |
| 23 (new) | ![]() | How to Talk to Girls At Parties (2018) | £23,311 | £23,311 | £23,311 | new | 1 |
| 24 (re) | ![]() | Tea With the Dames (2018) | £19,840 | £19,840 | £145,237 | re | 1 |
| 25 (new) | Anon (2018) | £19,108 | £19,108 | £19,108 | new | 1 | |
| 26 (new) | ![]() | A Wizards Tale (2018) | £13,271 | £13,271 | £13,271 | new | 1 |
| 27 (new) | Irumbu Thirai (2018) | £11,333 | £11,333 | £11,333 | new | 1 | |
| 28 (new) | That Good Night (2018) | £7,938 | £7,938 | £7,938 | new | 1 | |
| 29 (25) | ![]() | Ghost Stories (2018) | £7,732 | £17,551 | £1,630,443 | 17% | 6 |
| 30 (34) | ![]() | Finding Your Feet (2018) | £6,976 | £11,800 | £5,693,278 | 76% | 12 |
| 31 (23) | ![]() | Bing At the Cinema (2018) | £6,274 | £13,976 | £107,062 | -54% | 3 |
| 32 (51) | ![]() | Darkest Hour (2018) | £3,055 | £7,206 | £24,102,615 | 96% | 18 |
| 33 (re) | ![]() | Macbeth: NT Live 2018 (2018) | £2,170 | £2,170 | £465,277 | re | 1 |
| 34 (24) | ![]() | Early Man (2018) | £1,800 | £2,931 | £11,155,632 | -72% | 16 |
| 35 (40) | ![]() | You Were Never Really Here (2018) | £1,736 | £4,316 | £1,025,338 | 32% | 10 |
| 36 (new) | Kande (2018) | £1,723 | £1,723 | £1,723 | new | 1 | |
| 37 (28) | ![]() | Three Billboards Outside Ebbing, Missouri (2018) | £1,517 | £12,868 | £15,185,471 | -68% | 18 |
| 38 (new) | Mansfield 66/67 (2018) | £1,078 | £1,078 | £1,078 | new | 1 | |
| 39 (re) | ![]() | The Mercy (2018) | £754 | £754 | £884,375 | re | 11 |
| 40 (29) | The Delinquent Season (2018) | £721 | £3,295 | £25,432 | -75% | 3 | |
| 41 (43) | ![]() | Journeyman (2018) | £681 | £2,150 | £123,701 | 20% | 7 |
| 42 (39) | ![]() | Mary Magdalene (2018) | £650 | £1,719 | £801,749 | -46% | 9 |
| 43 (32) | New Town Utopia (2018) | £481 | £4,285 | £6,334 | -77% | 2 | |
| 44 (new) | Iruttu Arayil Murattu Kuthu (2018) | £378 | £378 | £378 | new | 1 | |
| 45 (re) | Akram Khan's Giselle: ENB 2017 (2018) | £339 | £339 | £94,090 | re | 2 | |
| 46 (38) | ![]() | Macbeth: RSC Live 2018 (2018) | £306 | £5,221 | £645,136 | -77% | 5 |
| 47 (58) | ![]() | Paddington 2 (2017) | £290 | £290 | £42,642,026 | 96% | 27 |
| 48 (46) | Monster Family (2018) | £287 | £1,383 | £358,494 | -43% | 11 | |
| 49 (56) | Psycho Vertical (2018) | £282 | £776 | £8,489 | 73% | 7 | |
| 50 (57) | ![]() | Tomb Raider (2018) | £226 | £1,005 | £7,736,992 | 73% | 9 |
| 51 (new) | Uncle (2018) | £212 | £212 | £212 | new | 1 | |
| 52 (50) | Walk Like a Panther (2018) | £188 | £997 | £206,748 | 19% | 10 | |
| 53 (42) | ![]() | Journeys End (2018) | £116 | £458 | £519,181 | -80% | 14 |
| 54 (45) | Julius Caesar: NT Live 2018 (2018) | £96 | £592 | £636,000 | -82% | 8 | |
| 55 (31) | ![]() | Modern Life Is Rubbish (2018) | £89 | £634 | £3,066 | -96% | 2 |
| 56 (55) | Wind In the Willows: The Musical (2018) | £64 | £1,357 | £79,454 | -28% | 6 | |
| 57 (re) | ![]() | Exhibition On Screen: Van Gogh 2018 (2018) | £55 | £55 | £65,099 | re | 5 |
| 58 (37) | Westwood: Punk, Icon, Activist (2018) | £29 | £1,068 | £131,661 | -98% | 8 | |