| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | The Meg (2018) | £3,651,111 | £3,651,111 | £3,651,111 | new | 1 |
| 2 (2) | ![]() | Mamma Mia! Here We Go Again () | £3,568,169 | £8,987,303 | £48,311,304 | -13% | 4 |
| 3 (4) | ![]() | Incredibles 2 () | £2,354,530 | £5,137,804 | £45,007,302 | -2% | 5 |
| 4 (1) | ![]() | Ant-Man and the Wasp (2018) | £2,282,343 | £5,504,993 | £10,493,740 | -54% | 2 |
| 5 (3) | ![]() | Mission:Impossible - Fallout () | £2,042,327 | £4,098,104 | £17,455,734 | -17% | 3 |
| 6 (5) | ![]() | Hotel Transylvania 3: Summer Vacation () | £1,565,618 | £3,488,412 | £11,249,963 | 7% | 3 |
| 7 (new) | ![]() | The Darkest Minds () | £388,325 | £388,325 | £388,325 | new | 1 |
| 8 (6) | ![]() | Teen Titans Go! to The Movies () | £246,390 | £623,391 | £1,013,117 | -37% | 2 |
| 9 (new) | ![]() | Unfriended Dark Web () | £223,110 | £223,110 | £223,110 | new | 1 |
| 10 (7) | ![]() | The First Purge (2018) | £117,451 | £269,141 | £5,776,741 | -32% | 6 |
| 11 (8) | ![]() | Jurassic World: Fallen Kingdom () | £102,957 | £301,697 | £41,281,227 | -38% | 10 |
| 12 (new) | Vishwaroopam 2 (2018) | £61,771 | £61,771 | £61,771 | new | 1 | |
| 13 (new) | Dog Days (2018) | £59,223 | £59,223 | £59,223 | new | 1 | |
| 14 (10) | ![]() | Ocean's 8 () | £47,159 | £105,665 | £11,029,049 | -20% | 8 |
| 15 (new) | ![]() | Heathers (1989) 30th Anniversary | £43,462 | £43,462 | £43,462 | re | 9 |
| 16 (11) | ![]() | Sherlock Gnomes () | £42,452 | £74,937 | £9,236,922 | -2% | 14 |
| 17 (15) | ![]() | Apostasy () | £35,730 | £68,963 | £215,086 | 13% | 3 |
| 18 (new) | The Heiresses () | £34,155 | £34,155 | £34,155 | new | 1 | |
| 19 (new) | Sgt. Stubby: An Unlikely Hero () | £30,993 | £30,993 | £30,993 | new | 1 | |
| 20 (19) | The Escape (2018) | £25,680 | £49,506 | £71,303 | 15% | 2 | |
| 21 (new) | ![]() | The Domestics (2018) | £24,133 | £24,133 | £24,133 | new | 1 |
| 22 (new) | ![]() | Pope Francis: A Man of His Word (2018) | £21,593 | £21,593 | £21,593 | new | 1 |
| 23 (16) | ![]() | Thomas & Friends: Big World Big Adventures: The Movie () | £20,391 | £45,777 | £418,538 | -10% | 4 |
| 24 (new) | ![]() | I Can Only Imagine (2018) | £19,897 | £19,897 | £19,897 | new | 1 |
| 25 (new) | Under the Tree () | £16,612 | £16,612 | £16,612 | new | 1 | |
| 26 (24) | Swimming With Men (2018) | £15,374 | £38,907 | £322,555 | 26% | 6 | |
| 27 (new) | The Negotiator () | £11,558 | £11,558 | £11,558 | new | 1 | |
| 28 (new) | ![]() | Leaning Into the Wind - Andy Goldsworthy (2018) | £11,054 | £11,054 | £11,054 | new | 1 |
| 29 (18) | Patrick (2018) | £8,712 | £49,272 | £1,184,710 | -60% | 7 | |
| 30 (31) | McQueen () | £5,953 | £11,374 | £640,737 | 42% | 10 | |
| 31 (35) | The More You Ignore Me () | £5,830 | £7,315 | £40,896 | 66% | 6 | |
| 32 (22) | ![]() | Hotel Artemis () | £5,206 | £19,211 | £714,515 | -65% | 4 |
| 33 (new) | ![]() | Srinivasa Kalyanam () | £3,804 | £3,804 | £3,804 | new | 1 |
| 34 (27) | ![]() | The Happy Prince () | £3,651 | £12,671 | £833,585 | -44% | 9 |
| 35 (30) | ![]() | The Beatles: Yellow Submarine () 50th Anniversary | £3,284 | £3,821 | £201,778 | -5% | 6 |
| 36 (re) | ![]() | The Bookshop (2018) | £2,854 | £2,854 | £354,422 | re | 6 |
| 37 (32) | Zoo () | £2,694 | £6,933 | £138,086 | -5% | 7 | |
| 38 (29) | ![]() | Whitney (2018) | £2,444 | £7,567 | £440,424 | -34% | 6 |
| 39 (34) | ![]() | Mary Shelley (2018) | £2,254 | £9,194 | £119,967 | 1% | 5 |
| 40 (45) | ![]() | Spitfire () | £2,208 | £5,990 | £230,866 | 64% | 4 |
| 41 (re) | Edie (2018) | £1,872 | £1,872 | £476,275 | re | 10 | |
| 42 (re) | Maurice (1987) | £1,706 | £1,706 | £32,783 | re | 7 | |
| 43 (28) | A Prayer Before Dawn (2018) | £1,627 | £6,367 | £82,156 | -72% | 4 | |
| 44 (48) | ![]() | Peter Rabbit (2018) | £1,072 | £1,980 | £41,005,948 | 54% | 22 |
| 45 (re) | ![]() | Damascus Cover (2018) | £923 | £923 | £6,412 | re | 1 |
| 46 (49) | Time Trial (2018) | £906 | £3,866 | £67,399 | 52% | 7 | |
| 47 (46) | ![]() | Avengers: Infinity War () | £818 | £4,247 | £70,803,241 | 11% | 16 |
| 48 (36) | ![]() | Isle of Dogs (2018) | £802 | £888 | £6,008,130 | -40% | 18 |
| 49 (42) | Tracking Edith () | £794 | £2,231 | £9,069 | -18% | 3 | |
| 50 (re) | ![]() | An Ideal Husband 2018 () | £786 | £786 | £388,476 | re | 2 |
| 51 (43) | Postcards From the 48% (2018) | £441 | £441 | £14,306 | -50% | 4 | |
| 52 (39) | Pin Cushion () | £424 | £4,546 | £40,680 | -61% | 5 | |
| 53 (52) | Arcadia (2018) | £377 | £797 | £29,713 | 34% | 7 | |
| 54 (re) | Ashke () | £196 | £196 | £2,959 | re | 2 | |
| 55 (41) | ![]() | Solo: A Star Wars Story (2018) | £48 | £520 | £19,430,029 | -95% | 12 |