| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Christopher Robin (2018) | £2,553,810 | £2,553,810 | £2,553,810 | new | 1 |
| 2 (2) | ![]() | Mamma Mia! Here We Go Again (2018) | £2,241,507 | £6,211,750 | £54,523,054 | -37% | 5 |
| 3 (1) | ![]() | The Meg (2018) | £2,113,490 | £4,910,665 | £8,561,776 | -42% | 2 |
| 4 (new) | ![]() | The Equalizer 2 (2018) | £1,980,754 | £1,980,754 | £1,980,754 | new | 1 |
| 5 (new) | ![]() | The Festival (2018) | £1,423,410 | £1,423,410 | £1,423,410 | new | 1 |
| 6 (3) | ![]() | Incredibles 2 (2018) | £1,359,602 | £3,572,450 | £48,579,752 | -42% | 6 |
| 7 (5) | ![]() | Mission:Impossible - Fallout (2018) | £1,174,345 | £2,646,593 | £20,102,327 | -42% | 4 |
| 8 (4) | ![]() | Ant-Man and the Wasp (2018) | £1,169,524 | £3,103,400 | £13,597,140 | -49% | 3 |
| 9 (new) | ![]() | William Shakespeares Romeo + Juliet (1997) Secret Cinema | £999,338 | £999,338 | £999,338 | re | 9 |
| 10 (6) | ![]() | Hotel Transylvania 3: Summer Vacation (2018) | £970,776 | £2,721,323 | £13,971,286 | -38% | 4 |
| 11 (new) | ![]() | Gold (2018) | £126,695 | £126,695 | £126,695 | new | 1 |
| 12 (8) | ![]() | Teen Titans Go! to The Movies (2018) | £102,957 | £381,658 | £1,394,775 | -58% | 3 |
| 13 (7) | ![]() | The Darkest Minds (2018) | £80,426 | £460,853 | £849,178 | -79% | 2 |
| 14 (9) | ![]() | Unfriended Dark Web (2018) | £76,157 | £275,100 | £498,210 | -66% | 2 |
| 15 (10) | ![]() | The First Purge (2018) | £55,500 | £127,933 | £5,904,674 | -53% | 7 |
| 16 (11) | ![]() | Jurassic World: Fallen Kingdom (2018) | £44,296 | £134,675 | £41,415,902 | -57% | 11 |
| 17 (new) | The Guardians (2018) | £35,218 | £35,218 | £35,218 | new | 1 | |
| 18 (new) | ![]() | Kolamavu Kokila (2018) | £28,597 | £28,597 | £28,597 | new | 1 |
| 19 (new) | Geetha Govindam (2018) | £25,573 | £25,573 | £25,573 | new | 1 | |
| 20 (44) | ![]() | Peter Rabbit (2018) | £25,350 | £25,951 | £41,031,899 | 96% | 23 |
| 21 (new) | Satyameva Jayate (2018) | £25,070 | £25,070 | £25,070 | new | 1 | |
| 22 (17) | ![]() | Apostasy (2018) | £20,480 | £56,577 | £271,663 | -43% | 4 |
| 23 (new) | ![]() | Mr. & Mrs. 420 Returns (2018) | £17,344 | £17,344 | £17,344 | new | 1 |
| 24 (20) | The Escape (2018) | £15,099 | £39,407 | £110,710 | -41% | 3 | |
| 25 (new) | The Eyes of Orson Welles (2018) | £14,582 | £14,582 | £14,582 | new | 1 | |
| 26 (19) | Sgt. Stubby: An Unlikely Hero (2018) | £13,832 | £48,358 | £79,351 | -55% | 2 | |
| 27 (23) | ![]() | Thomas & Friends: Big World Big Adventures: The Movie (2018) | £10,407 | £28,232 | £446,770 | -49% | 5 |
| 28 (26) | Swimming With Men (2018) | £5,203 | £25,396 | £347,951 | -66% | 7 | |
| 29 (30) | McQueen (2018) | £4,826 | £8,611 | £649,348 | -19% | 11 | |
| 30 (34) | ![]() | The Happy Prince (2018) | £4,142 | £8,177 | £841,762 | 12% | 10 |
| 31 (28) | ![]() | Leaning Into the Wind - Andy Goldsworthy (2018) | £3,876 | £14,936 | £25,990 | -65% | 2 |
| 32 (16) | ![]() | Sherlock Gnomes (2018) | £3,675 | £49,474 | £9,286,396 | -91% | 15 |
| 33 (35) | ![]() | The Beatles: Yellow Submarine (1968) 50th Anniversary | £3,069 | £4,017 | £205,795 | -7% | 7 |
| 34 (new) | ![]() | Along With the Gods: The Last 49 Days (2018) | £2,946 | £2,946 | £2,946 | new | 1 |
| 35 (new) | Koode (2018) | £2,721 | £2,721 | £2,721 | new | 1 | |
| 36 (29) | Patrick (2018) | £2,371 | £13,428 | £1,198,138 | -73% | 8 | |
| 37 (39) | ![]() | Mary Shelley (2018) | £2,190 | £8,573 | £128,540 | -3% | 6 |
| 38 (43) | A Prayer Before Dawn (2018) | £1,626 | £2,998 | £85,154 | 0% | 5 | |
| 39 (re) | An American In Paris: The Musical (2018) | £1,435 | £1,435 | £797,082 | re | 11 | |
| 40 (52) | Pin Cushion (2018) | £1,364 | £3,770 | £44,450 | 69% | 6 | |
| 41 (48) | ![]() | Isle of Dogs (2018) | £1,308 | £1,308 | £6,009,438 | 39% | 19 |
| 42 (49) | Tracking Edith (2018) | £1,227 | £1,912 | £10,981 | 35% | 4 | |
| 43 (36) | ![]() | The Bookshop (2018) | £1,135 | £23,315 | £377,737 | -60% | 7 |
| 44 (re) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £1,079 | £1,079 | £5,874,289 | re | 17 |
| 45 (37) | Zoo (2018) | £1,019 | £5,979 | £144,065 | -62% | 8 | |
| 46 (re) | ![]() | Everybody's Talking About Jamie (2018) | £991 | £991 | £696,759 | re | 5 |
| 47 (40) | ![]() | Spitfire (2018) | £952 | £8,518 | £239,384 | -57% | 5 |
| 48 (31) | The More You Ignore Me (2018) | £951 | £6,893 | £47,789 | -84% | 7 | |
| 49 (32) | ![]() | Hotel Artemis (2018) | £719 | £4,497 | £719,012 | -86% | 5 |
| 50 (53) | Arcadia (2018) | £702 | £702 | £30,415 | 46% | 8 | |
| 51 (55) | ![]() | Solo: A Star Wars Story (2018) | £644 | £2,362 | £19,432,391 | 93% | 13 |
| 52 (45) | ![]() | Damascus Cover (2018) | £631 | £1,252 | £7,664 | -32% | 2 |
| 53 (38) | ![]() | Whitney (2018) | £531 | £6,670 | £447,094 | -78% | 7 |
| 54 (re) | ![]() | Lady Windermere's Fan 2018 (2018) | £400 | £400 | £451,328 | re | 6 |
| 55 (47) | ![]() | Avengers: Infinity War (2018) | £391 | £1,651 | £70,804,892 | -52% | 17 |
| 56 (re) | Down a Dark Hall (2018) | £0 | £0 | £181,085 | re | 1 | |