| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (new) | ![]() | Ant-Man and the Wasp (2018) | £4,988,747 | £4,988,747 | £4,988,747 | new | 1 |
| 2 (2) | ![]() | Mamma Mia! Here We Go Again (2018) | £4,121,275 | £12,305,933 | £39,324,001 | -42% | 3 |
| 3 (1) | ![]() | Mission:Impossible - Fallout (2018) | £2,471,073 | £6,057,527 | £13,357,630 | -66% | 2 |
| 4 (3) | ![]() | Incredibles 2 (2018) | £2,391,917 | £6,652,739 | £39,869,498 | -54% | 4 |
| 5 (4) | ![]() | Hotel Transylvania 3: Summer Vacation (2018) | £1,451,295 | £4,311,675 | £7,761,551 | -58% | 2 |
| 6 (new) | ![]() | Teen Titans Go! to The Movies (2018) | £389,726 | £389,726 | £389,726 | new | 1 |
| 7 (8) | ![]() | The First Purge (2018) | £172,871 | £405,783 | £5,507,600 | -38% | 5 |
| 8 (6) | ![]() | Jurassic World: Fallen Kingdom (2018) | £166,187 | £479,524 | £40,979,530 | -52% | 9 |
| 9 (7) | ![]() | Skyscraper (2018) | £118,809 | £402,785 | £5,126,110 | -64% | 4 |
| 10 (9) | ![]() | Ocean's 8 (2018) | £58,824 | £169,726 | £10,923,384 | -53% | 7 |
| 11 (10) | ![]() | Sherlock Gnomes (2018) | £43,209 | £144,563 | £9,161,985 | -56% | 13 |
| 12 (new) | Fanney Khan (2018) | £36,639 | £36,639 | £36,639 | new | 1 | |
| 13 (new) | The Producers (1967) | £35,745 | £35,745 | £35,745 | new | 1 | |
| 14 (5) | ![]() | André Rieu's 2018 Maastricht Concert (2018) | £35,582 | £164,578 | £1,651,106 | -98% | 2 |
| 15 (12) | ![]() | Apostasy (2018) | £30,912 | £80,121 | £146,123 | -53% | 2 |
| 16 (11) | ![]() | Thomas & Friends: Big World Big Adventures: The Movie (2018) | £22,674 | £76,714 | £372,761 | -71% | 3 |
| 17 (new) | ![]() | Sicilian Ghost Story (2018) | £21,937 | £21,937 | £21,937 | new | 1 |
| 18 (17) | Patrick (2018) | £21,825 | £38,351 | £1,135,438 | 41% | 6 | |
| 19 (new) | The Escape (2018) | £21,797 | £21,797 | £21,797 | new | 1 | |
| 20 (new) | Mulk (2018) | £18,094 | £18,094 | £18,094 | new | 1 | |
| 21 (new) | Karwaan (2018) | £15,331 | £15,331 | £15,331 | new | 1 | |
| 22 (13) | ![]() | Hotel Artemis (2018) | £14,711 | £70,853 | £695,304 | -77% | 3 |
| 23 (new) | The Big Bad Fox and Other Tales (2017) | £11,371 | £11,371 | £11,371 | new | 1 | |
| 24 (16) | Swimming With Men (2018) | £11,358 | £39,159 | £283,648 | -17% | 5 | |
| 25 (new) | The Apparition (2018) | £11,124 | £11,124 | £11,124 | new | 1 | |
| 26 (new) | Hearts Beat Loud (2018) | £10,871 | £10,871 | £10,871 | new | 1 | |
| 27 (25) | ![]() | The Happy Prince (2018) | £6,527 | £20,247 | £820,914 | 2% | 8 |
| 28 (22) | A Prayer Before Dawn (2018) | £5,872 | £10,130 | £75,789 | -20% | 3 | |
| 29 (20) | ![]() | Whitney (2018) | £3,685 | £12,149 | £432,857 | -60% | 5 |
| 30 (40) | ![]() | The Beatles: Yellow Submarine (1968) 50th Anniversary | £3,472 | £6,838 | £197,957 | 73% | 5 |
| 31 (21) | McQueen (2018) | £3,468 | £10,815 | £629,363 | -57% | 9 | |
| 32 (24) | Zoo (2018) | £2,848 | £10,706 | £131,153 | -58% | 6 | |
| 33 (38) | Romeo and Juliet: RSC Live 2018 (2018) | £2,397 | £3,013 | £272,510 | 56% | 3 | |
| 34 (re) | ![]() | Mary Shelley (2018) | £2,242 | £2,242 | £110,773 | re | 4 |
| 35 (32) | The More You Ignore Me (2018) | £1,994 | £7,182 | £33,581 | -35% | 5 | |
| 36 (re) | ![]() | Isle of Dogs (2018) | £1,343 | £1,343 | £6,007,242 | re | 17 |
| 37 (re) | Funny Cow (2018) | £1,294 | £1,294 | £531,228 | re | 13 | |
| 38 (re) | An American In Paris: The Musical (2018) | £1,090 | £1,090 | £790,463 | re | 10 | |
| 39 (37) | Pin Cushion (2018) | £1,088 | £4,485 | £36,134 | -5% | 4 | |
| 40 (19) | ![]() | Kaiser: The Greatest Footballer Never to Play Football (2018) | £1,023 | £1,023 | £11,984 | -91% | 2 |
| 41 (23) | ![]() | Solo: A Star Wars Story (2018) | £980 | £7,503 | £19,429,509 | -86% | 11 |
| 42 (30) | Tracking Edith (2018) | £971 | £3,069 | £6,838 | -74% | 2 | |
| 43 (re) | Postcards From the 48% (2018) | £874 | £874 | £13,865 | re | 3 | |
| 44 (36) | ![]() | Everybody's Talking About Jamie (2018) | £843 | £2,327 | £681,858 | -39% | 4 |
| 45 (35) | ![]() | Spitfire (2018) | £798 | £6,604 | £224,876 | -48% | 3 |
| 46 (26) | ![]() | Avengers: Infinity War (2018) | £725 | £5,795 | £70,798,994 | -88% | 15 |
| 47 (re) | Akram Khan's Giselle: ENB 2017 (2018) | £585 | £585 | £112,991 | re | 6 | |
| 48 (28) | ![]() | Peter Rabbit (2018) | £498 | £5,144 | £41,003,968 | -88% | 21 |
| 49 (48) | Time Trial (2018) | £437 | £437 | £63,533 | 38% | 6 | |
| 50 (re) | Saul: Glyndebourne 2015 (2018) | £395 | £395 | £45,640 | re | 1 | |
| 51 (42) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £272 | £1,734 | £5,872,829 | -61% | 16 |
| 52 (43) | Arcadia (2018) | £248 | £1,548 | £28,916 | -43% | 6 | |
| 53 (39) | The Receptionist (2018) | £146 | £279 | £8,318 | -85% | 2 | |
| 54 (45) | ![]() | On Chesil Beach (2018) | £121 | £5,179 | £1,002,575 | -59% | 12 |