| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Christopher Robin () | £2,138,824 | £4,630,555 | £7,184,365 | -16% | 2 |
| 2 (2) | ![]() | Mamma Mia! Here We Go Again () | £1,701,162 | £4,225,692 | £58,748,746 | -24% | 6 |
| 3 (3) | ![]() | The Meg (2018) | £1,502,535 | £3,172,754 | £11,734,530 | -29% | 3 |
| 4 (6) | ![]() | Incredibles 2 () | £1,268,401 | £2,650,054 | £51,229,806 | -7% | 7 |
| 5 (4) | ![]() | The Equalizer 2 (2018) | £1,256,615 | £2,577,970 | £4,558,724 | -37% | 2 |
| 6 (new) | ![]() | BlackKKlansman () | £1,234,214 | £1,234,214 | £1,234,214 | new | 1 |
| 7 (new) | ![]() | The Spy Who Dumped Me (2018) | £1,057,211 | £1,057,211 | £1,057,211 | new | 1 |
| 8 (7) | ![]() | Mission:Impossible - Fallout () | £924,424 | £1,753,006 | £21,855,333 | -21% | 5 |
| 9 (10) | ![]() | Hotel Transylvania 3: Summer Vacation () | £910,555 | £1,995,112 | £15,966,398 | -6% | 5 |
| 10 (8) | ![]() | Ant-Man and the Wasp (2018) | £794,409 | £1,872,926 | £15,470,066 | -32% | 4 |
| 11 (new) | ![]() | The Children Act () | £517,378 | £517,378 | £517,378 | new | 1 |
| 12 (5) | ![]() | The Festival () | £458,095 | £1,117,055 | £2,540,465 | -68% | 2 |
| 13 (9) | ![]() | William Shakespeares Romeo + Juliet (1997) Secret Cinema | £457,323 | £457,323 | £1,456,661 | -54% | 10 |
| 14 (new) | ![]() | Slender Man (2018) | £389,339 | £389,339 | £389,339 | new | 1 |
| 15 (new) | ![]() | Alpha () | £225,606 | £225,606 | £225,606 | new | 1 |
| 16 (new) | ![]() | Luis and the Aliens () | £218,248 | £218,248 | £218,248 | new | 1 |
| 17 (new) | ![]() | Jawani Phir Nahi Ani 2 () | £203,714 | £203,714 | £203,714 | new | 1 |
| 18 (32) | ![]() | Sherlock Gnomes () | £47,356 | £51,147 | £9,337,543 | 92% | 16 |
| 19 (new) | Load Wedding (2018) | £46,413 | £46,413 | £46,413 | new | 1 | |
| 20 (new) | ![]() | Happy Phirr Bhag Jayegi () | £44,585 | £44,585 | £44,585 | new | 1 |
| 21 (new) | Parwaaz Hai Junoon (2018) | £40,230 | £40,230 | £40,230 | new | 1 | |
| 22 (16) | ![]() | Jurassic World: Fallen Kingdom () | £27,836 | £74,539 | £41,490,441 | -37% | 12 |
| 23 (27) | ![]() | Thomas & Friends: Big World Big Adventures: The Movie () | £12,199 | £20,667 | £467,437 | 15% | 6 |
| 24 (new) | The King (2018) | £11,136 | £11,136 | £11,136 | new | 1 | |
| 25 (22) | ![]() | Apostasy () | £9,495 | £31,989 | £303,652 | -54% | 5 |
| 26 (new) | Bad Samaritan (2018) | £7,258 | £7,258 | £7,258 | new | 1 | |
| 27 (26) | Sgt. Stubby: An Unlikely Hero () | £5,595 | £20,503 | £99,854 | -60% | 3 | |
| 28 (20) | ![]() | Peter Rabbit (2018) | £5,200 | £35,858 | £41,067,757 | -79% | 24 |
| 29 (28) | Swimming With Men (2018) | £3,714 | £38,530 | £386,481 | -29% | 8 | |
| 30 (24) | The Escape (2018) | £3,399 | £17,646 | £128,356 | -77% | 4 | |
| 31 (29) | McQueen () | £2,803 | £7,008 | £656,356 | -42% | 12 | |
| 32 (46) | ![]() | Everybody's Talking About Jamie () | £2,399 | £8,011 | £704,770 | 59% | 6 |
| 33 (25) | The Eyes of Orson Welles () | £2,117 | £14,191 | £28,773 | -85% | 2 | |
| 34 (47) | ![]() | Spitfire () | £2,030 | £13,562 | £252,946 | 53% | 6 |
| 35 (33) | ![]() | The Beatles: Yellow Submarine () 50th Anniversary | £1,427 | £4,765 | £210,560 | -54% | 8 |
| 36 (48) | The More You Ignore Me () | £1,230 | £3,156 | £50,945 | 23% | 8 | |
| 37 (36) | Patrick (2018) | £1,111 | £3,735 | £1,201,873 | -53% | 9 | |
| 38 (new) | ![]() | One Note At a Time (2018) | £1,007 | £1,007 | £1,007 | new | 1 |
| 39 (31) | ![]() | Leaning Into the Wind - Andy Goldsworthy (2018) | £993 | £4,022 | £30,012 | -74% | 3 |
| 40 (37) | ![]() | Mary Shelley (2018) | £848 | £5,801 | £134,341 | -61% | 7 |
| 41 (new) | Guru Da Banda (2018) | £695 | £695 | £695 | new | 1 | |
| 42 (42) | Tracking Edith () | £645 | £2,241 | £13,222 | -47% | 5 | |
| 43 (52) | ![]() | Damascus Cover (2018) | £631 | £0 | £7,664 | 0% | 3 |
| 44 (re) | Swan Lake: ROH London 2017/18 () | £608 | £608 | £877,328 | re | 3 | |
| 45 (43) | ![]() | The Bookshop (2018) | £578 | £5,357 | £383,094 | -49% | 8 |
| 46 (38) | A Prayer Before Dawn (2018) | £544 | £946 | £86,100 | -67% | 6 | |
| 47 (51) | ![]() | Solo: A Star Wars Story (2018) | £521 | £1,074 | £19,433,465 | -19% | 14 |
| 48 (re) | Time Trial (2018) | £458 | £458 | £67,942 | re | 8 | |
| 49 (54) | ![]() | Lady Windermere's Fan 2018 () | £400 | £0 | £451,328 | 0% | 7 |
| 50 (55) | ![]() | Avengers: Infinity War () | £391 | £0 | £70,804,892 | 0% | 18 |
| 51 (53) | ![]() | Whitney (2018) | £355 | £1,588 | £448,682 | -33% | 8 |
| 52 (45) | Zoo () | £222 | £1,137 | £145,202 | -78% | 9 | |
| 53 (49) | ![]() | Hotel Artemis () | £180 | £2,089 | £721,101 | -75% | 6 |