| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Incredibles 2 () | £9,650,000 | £9,650,000 | £9,650,000 | new | 1 |
| 2 (new) | ![]() | Skyscraper () | £1,829,830 | £1,829,830 | £1,829,830 | new | 1 |
| 3 (2) | ![]() | Jurassic World: Fallen Kingdom () | £824,705 | £1,669,884 | £38,480,573 | -37% | 6 |
| 4 (1) | ![]() | The First Purge (2018) | £798,455 | £1,589,789 | £3,367,946 | -55% | 2 |
| 5 (3) | ![]() | Ocean's 8 () | £529,697 | £1,201,969 | £9,731,255 | -37% | 4 |
| 6 (new) | ![]() | The Secret of Marrowbone () | £171,161 | £171,161 | £171,161 | new | 1 |
| 7 (4) | ![]() | Sicario 2: Soldado () | £131,078 | £376,168 | £1,838,626 | -59% | 3 |
| 8 (9) | ![]() | Sanju (2018) | £96,329 | £212,265 | £1,150,401 | -56% | 3 |
| 9 (8) | ![]() | Hereditary () | £91,897 | £277,708 | £5,368,030 | -59% | 5 |
| 10 (6) | ![]() | Adrift () | £75,742 | £288,321 | £1,267,325 | -67% | 3 |
| 11 (5) | ![]() | Tag () | £75,419 | £282,565 | £1,346,420 | -70% | 3 |
| 12 (7) | Patrick (2018) | £74,094 | £241,351 | £964,669 | -67% | 3 | |
| 13 (new) | ![]() | First Reformed (2018) | £73,233 | £73,233 | £73,233 | new | 1 |
| 14 (13) | ![]() | Deadpool 2 () | £67,155 | £163,184 | £32,501,893 | -49% | 9 |
| 15 (12) | ![]() | Whitney (2018) | £44,968 | £180,596 | £323,532 | -69% | 2 |
| 16 (15) | ![]() | Sherlock Gnomes () | £34,055 | £82,746 | £8,670,640 | -64% | 10 |
| 17 (16) | ![]() | Solo: A Star Wars Story (2018) | £25,647 | £82,514 | £19,371,203 | -72% | 8 |
| 18 (17) | Swimming With Men (2018) | £22,791 | £100,508 | £171,244 | -62% | 2 | |
| 19 (29) | ![]() | Everybody's Talking About Jamie () | £21,907 | £67,100 | £610,729 | 75% | 2 |
| 20 (43) | ![]() | Lean On Pete () | £19,440 | £20,169 | £406,879 | 97% | 11 |
| 21 (20) | ![]() | The Bookshop (2018) | £15,663 | £79,747 | £235,938 | -48% | 3 |
| 22 (18) | ![]() | Avengers: Infinity War () | £15,486 | £45,874 | £70,756,722 | -64% | 12 |
| 23 (19) | ![]() | The Happy Prince () | £15,334 | £63,182 | £723,512 | -56% | 5 |
| 24 (new) | Vadhayiyaan Ji Vadhayiyaan (2018) | £13,873 | £13,873 | £13,873 | new | 1 | |
| 25 (new) | Racer and the Jailbird () | £13,386 | £13,386 | £13,386 | new | 1 | |
| 26 (21) | ![]() | Mary Shelley (2018) | £12,727 | £34,817 | £51,379 | -23% | 2 |
| 27 (22) | Zoo () | £12,403 | £37,134 | £82,104 | -22% | 3 | |
| 28 (new) | Tamizh Padam 2 (2018) | £10,071 | £10,071 | £10,071 | new | 1 | |
| 29 (new) | Pin Cushion () | £9,936 | £9,936 | £9,936 | new | 1 | |
| 30 (24) | McQueen () | £8,231 | £28,030 | £578,953 | -14% | 6 | |
| 31 (10) | ![]() | The Beatles: Yellow Submarine () 50th Anniversary | £7,600 | £7,527 | £170,682 | -95% | 2 |
| 32 (23) | ![]() | Peter Rabbit (2018) | £6,628 | £17,827 | £40,986,665 | -54% | 18 |
| 33 (new) | Kadai Kutty Singam (2018) | £5,732 | £5,732 | £5,732 | new | 1 | |
| 34 (new) | Summer 1993 () | £4,796 | £4,796 | £4,796 | new | 1 | |
| 35 (new) | Ex Libris: The New York Public Library (2018) | £3,262 | £3,262 | £3,262 | new | 1 | |
| 36 (38) | Edie (2018) | £3,166 | £19,596 | £442,682 | 54% | 8 | |
| 37 (new) | Mario () | £2,565 | £2,565 | £2,565 | new | 1 | |
| 38 (34) | ![]() | 2001: A Space Odyssey () Rerelease | £2,472 | £2,472 | £413,074 | 15% | 37 |
| 39 (33) | Time Trial (2018) | £2,466 | £38,506 | £57,551 | 13% | 3 | |
| 40 (39) | ![]() | On Chesil Beach () | £1,845 | £8,202 | £989,898 | 46% | 9 |
| 41 (37) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £1,456 | £10,362 | £5,855,210 | -3% | 13 |
| 42 (new) | Path of Blood () | £1,299 | £1,299 | £1,299 | new | 1 | |
| 43 (54) | ![]() | Early Man () | £1,138 | £1,680 | £11,202,468 | 90% | 25 |
| 44 (re) | Akram Khan's Giselle: ENB 2017 (2018) | £843 | £843 | £111,519 | re | 5 | |
| 45 (25) | The More You Ignore Me () | £762 | £10,684 | £19,104 | -91% | 2 | |
| 46 (46) | ![]() | Finding Your Feet (2018) | £700 | £700 | £5,780,233 | 45% | 19 |
| 47 (42) | ![]() | Tea With the Dames () | £242 | £866 | £196,183 | -51% | 10 |
| 48 (47) | Arcadia (2018) | £237 | £1,018 | £23,531 | -12% | 4 | |
| 49 (35) | ![]() | Isle of Dogs (2018) | £142 | £1,082 | £6,003,021 | -92% | 16 |
| 50 (re) | A Woman of No Importance 2017 () | £142 | £142 | £328,885 | re | 5 | |
| 51 (48) | ![]() | The Bromley Boys (2018) | £80 | £1,431 | £14,895 | -57% | 7 |
| 52 (re) | Postcards From the 48% (2018) | £74 | £74 | £4,416 | re | 1 | |
| 53 (re) | Mckellen Playing the Part Live 2018 () | £47 | £47 | £47,277 | re | 7 | |
| 54 (40) | Terminal (2018) | £22 | £542 | £1,435 | -98% | 2 | |
| 55 (re) | ![]() | Entebbe (2018) | £18 | £18 | £311,546 | re | 8 |