| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | The First Purge (2018) | £1,778,157 | £1,778,157 | £1,778,157 | new | 1 |
| 2 (1) | ![]() | Jurassic World: Fallen Kingdom (2018) | £1,318,104 | £2,312,578 | £36,810,689 | -34% | 5 |
| 3 (2) | ![]() | Ocean's 8 (2018) | £837,427 | £1,667,679 | £8,529,286 | -35% | 3 |
| 4 (3) | ![]() | Sicario 2: Soldado (2018) | £321,750 | £763,992 | £1,462,458 | -54% | 2 |
| 5 (4) | ![]() | Tag (2018) | £250,517 | £588,482 | £1,063,855 | -47% | 2 |
| 6 (7) | ![]() | Adrift (2018) | £229,898 | £573,764 | £979,004 | -43% | 2 |
| 7 (8) | Patrick (2018) | £226,306 | £423,457 | £723,318 | -25% | 2 | |
| 8 (6) | ![]() | Hereditary (2018) | £224,003 | £511,796 | £5,090,322 | -48% | 4 |
| 9 (5) | ![]() | Sanju (2018) | £221,424 | £489,477 | £938,136 | -51% | 2 |
| 10 (new) | ![]() | The Beatles: Yellow Submarine (1968) 50th Anniversary | £163,155 | £163,155 | £163,155 | re | 1 |
| 11 (new) | ![]() | Uncle Drew (2018) | £151,337 | £151,337 | £151,337 | new | 1 |
| 12 (new) | ![]() | Whitney (2018) | £142,936 | £142,936 | £142,936 | new | 1 |
| 13 (9) | ![]() | Deadpool 2 (2018) | £131,498 | £289,111 | £32,338,709 | -46% | 8 |
| 14 (12) | ![]() | Blade Runner (1982) Rerelease | £115,406 | £166,676 | £5,080,971 | 9% | 21 |
| 15 (11) | ![]() | Sherlock Gnomes (2018) | £95,004 | £142,276 | £8,587,894 | -11% | 9 |
| 16 (10) | ![]() | Solo: A Star Wars Story (2018) | £91,848 | £189,924 | £19,288,689 | -52% | 7 |
| 17 (re) | Swimming With Men (2018) | £59,301 | £59,301 | £70,736 | re | 1 | |
| 18 (13) | ![]() | Avengers: Infinity War (2018) | £43,003 | £84,142 | £70,710,848 | -45% | 11 |
| 19 (14) | ![]() | The Happy Prince (2018) | £34,681 | £120,066 | £660,330 | -48% | 4 |
| 20 (15) | ![]() | The Bookshop (2018) | £30,074 | £90,633 | £156,191 | -54% | 2 |
| 21 (new) | ![]() | Mary Shelley (2018) | £16,562 | £16,562 | £16,562 | new | 1 |
| 22 (20) | Zoo (2018) | £15,860 | £32,454 | £44,970 | 21% | 2 | |
| 23 (21) | ![]() | Peter Rabbit (2018) | £14,424 | £17,086 | £40,968,838 | 15% | 17 |
| 24 (17) | McQueen (2018) | £9,616 | £30,304 | £550,923 | -45% | 5 | |
| 25 (new) | The More You Ignore Me (2018) | £8,420 | £8,420 | £8,420 | new | 1 | |
| 26 (new) | Flying the Nest (2018) | £8,217 | £8,217 | £8,217 | new | 1 | |
| 27 (new) | ![]() | Nankana (2018) | £7,626 | £7,626 | £7,626 | new | 1 |
| 28 (new) | ![]() | Ideal Home (2018) | £5,868 | £5,868 | £5,868 | new | 1 |
| 29 (re) | ![]() | Everybody's Talking About Jamie (2018) | £5,557 | £5,557 | £543,629 | re | 1 |
| 30 (new) | Peledu Kalnas (2018) | £5,119 | £5,119 | £5,119 | new | 1 | |
| 31 (new) | ![]() | Na Band Na Baraati (2018) | £4,623 | £4,623 | £4,623 | new | 1 |
| 32 (new) | Mr. Chandramouli (2018) | £3,056 | £3,056 | £3,056 | new | 1 | |
| 33 (19) | Time Trial (2018) | £2,136 | £5,285 | £19,045 | -84% | 2 | |
| 34 (29) | ![]() | 2001: A Space Odyssey (1968) Rerelease | £2,103 | £2,103 | £410,602 | -37% | 36 |
| 35 (31) | ![]() | Isle of Dogs (2018) | £1,770 | £2,476 | £6,001,939 | 7% | 15 |
| 36 (new) | In Darkness (2018) | £1,550 | £1,550 | £1,550 | new | 1 | |
| 37 (26) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £1,502 | £13,132 | £5,844,848 | -70% | 12 |
| 38 (27) | Edie (2018) | £1,457 | £12,412 | £423,086 | -66% | 7 | |
| 39 (25) | ![]() | On Chesil Beach (2018) | £990 | £14,373 | £981,696 | -87% | 8 |
| 40 (new) | Terminal (2018) | £893 | £893 | £893 | new | 1 | |
| 41 (new) | Eugene! Onegin: Met Opera 2018 (2018) | £524 | £524 | £524 | new | 1 | |
| 42 (44) | ![]() | Tea With the Dames (2018) | £494 | £1,206 | £195,317 | 87% | 9 |
| 43 (32) | ![]() | Lean On Pete (2018) | £491 | £3,034 | £386,710 | -57% | 10 |
| 44 (43) | Funny Cow (2018) | £428 | £1,819 | £525,294 | 84% | 12 | |
| 45 (35) | An American In Paris: The Musical (2018) | £417 | £4,990 | £778,235 | -40% | 8 | |
| 46 (re) | ![]() | Finding Your Feet (2018) | £388 | £388 | £5,779,533 | re | 18 |
| 47 (30) | Arcadia (2018) | £270 | £3,817 | £22,513 | -89% | 3 | |
| 48 (40) | ![]() | The Bromley Boys (2018) | £186 | £718 | £13,464 | 27% | 6 |
| 49 (re) | A Cambodian Spring (2018) | £164 | £164 | £14,604 | re | 6 | |
| 50 (37) | Stanley a Man of Variety (2018) | £159 | £338 | £5,734 | -61% | 4 | |
| 51 (re) | New Town Utopia (2018) | £154 | £154 | £11,168 | re | 7 | |
| 52 (34) | ![]() | Beast (2018) | £133 | £957 | £416,957 | -82% | 10 |
| 53 (45) | That Good Night (2018) | £110 | £1,767 | £59,990 | 70% | 8 | |
| 54 (39) | ![]() | Early Man (2018) | £110 | £798 | £11,200,788 | -27% | 24 |
| 55 (36) | ![]() | Macbeth: NT Live 2018 (2018) | £34 | £1,074 | £504,905 | -92% | 7 |
| 56 (re) | ![]() | The Beatles: Eight Days a Week - The Touring Years (2016) | £28 | £28 | £1,187,131 | re | 14 |