| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Jurassic World: Fallen Kingdom (2018) | £7,220,952 | £11,236,951 | £25,571,845 | -50% | 2 |
| 2 (new) | ![]() | Hereditary (2018) | £1,863,913 | £1,863,913 | £1,863,913 | new | 1 |
| 3 (2) | ![]() | Solo: A Star Wars Story (2018) | £972,673 | £1,597,934 | £17,988,593 | -18% | 4 |
| 4 (3) | ![]() | Deadpool 2 (2018) | £874,668 | £1,576,642 | £30,619,381 | -26% | 5 |
| 5 (new) | ![]() | Race 3 (2018) | £782,951 | £782,951 | £782,951 | new | 1 |
| 6 (4) | ![]() | Book Club (2018) | £413,904 | £1,090,577 | £3,128,182 | -19% | 3 |
| 7 (5) | ![]() | Avengers: Infinity War (2018) | £408,451 | £605,169 | £70,168,399 | 1% | 8 |
| 8 (6) | ![]() | Sherlock Gnomes (2018) | £404,882 | £465,653 | £8,045,654 | 26% | 6 |
| 9 (8) | ![]() | Show Dogs (2018) | £226,703 | £271,378 | £2,820,827 | 11% | 4 |
| 10 (7) | ![]() | Blade Runner (1982) Rerelease | £166,756 | £447,250 | £3,792,376 | -26% | 18 |
| 11 (new) | ![]() | The Happy Prince (2018) | £107,178 | £107,178 | £107,178 | new | 1 |
| 12 (new) | ![]() | Super Troopers 2 (2018) | £101,881 | £101,881 | £101,881 | new | 1 |
| 13 (10) | McQueen (2018) | £98,753 | £208,686 | £339,964 | -25% | 2 | |
| 14 (re) | Swan Lake: ROH London 2017/18 (2018) | £71,257 | £71,257 | £833,403 | re | 1 | |
| 15 (12) | ![]() | I Feel Pretty (2018) | £59,214 | £132,643 | £5,384,881 | -38% | 7 |
| 16 (16) | ![]() | Peter Rabbit (2018) | £35,710 | £111,750 | £40,784,694 | -8% | 14 |
| 17 (new) | 7 Din Mohabbat In (2018) | £34,351 | £34,351 | £34,351 | new | 1 | |
| 18 (14) | ![]() | On Chesil Beach (2018) | £27,237 | £96,749 | £883,169 | -47% | 5 |
| 19 (new) | Studio 54 (2018) | £20,550 | £20,550 | £20,550 | new | 1 | |
| 20 (17) | Edie (2018) | £18,964 | £70,605 | £336,580 | -35% | 4 | |
| 21 (18) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £12,561 | £44,607 | £5,776,342 | -45% | 9 |
| 22 (20) | ![]() | 2001: A Space Odyssey (1968) Re-Release | £11,139 | £11,139 | £403,061 | 4% | 33 |
| 23 (new) | The Ciambra (2018) | £10,312 | £10,312 | £10,312 | new | 1 | |
| 24 (21) | ![]() | Early Man (2018) | £9,986 | £10,088 | £11,197,873 | 16% | 21 |
| 25 (re) | ![]() | The Piano (1993) | £8,357 | £8,357 | £3,508,357 | re | 12 |
| 26 (24) | ![]() | Isle of Dogs (2018) | £6,119 | £9,535 | £5,992,346 | 42% | 12 |
| 27 (22) | ![]() | Lean On Pete (2018) | £5,877 | £13,931 | £375,359 | -2% | 7 |
| 28 (25) | ![]() | Entebbe (2018) | £3,700 | £7,229 | £306,022 | 29% | 6 |
| 29 (27) | That Good Night (2018) | £2,252 | £7,725 | £47,626 | -7% | 5 | |
| 30 (31) | An American In Paris: The Musical (2018) | £1,830 | £7,299 | £763,230 | 2% | 5 | |
| 31 (28) | ![]() | Bobby Robson More Than a Manager (2018) | £1,751 | £5,581 | £24,066 | -25% | 3 |
| 32 (32) | Funny Cow (2018) | £1,091 | £6,926 | £514,222 | -26% | 9 | |
| 33 (33) | Lek and the Dogs (2018) | £820 | £2,002 | £3,258 | -35% | 2 | |
| 34 (re) | ![]() | Three Billboards Outside Ebbing, Missouri (2018) | £713 | £713 | £15,238,741 | re | 20 |
| 35 (42) | Mckellen Playing the Part Live 2018 (2018) | £618 | £726 | £44,184 | 85% | 4 | |
| 36 (29) | ![]() | The Bromley Boys (2018) | £611 | £2,030 | £9,630 | -72% | 3 |
| 37 (30) | ![]() | Tea With the Dames (2018) | £534 | £3,519 | £188,498 | -74% | 6 |
| 38 (23) | ![]() | Beast (2018) | £520 | £4,289 | £413,338 | -88% | 7 |
| 39 (new) | Stanley a Man of Variety (2018) | £439 | £439 | £439 | new | 1 | |
| 40 (35) | A Cambodian Spring (2018) | £432 | £1,401 | £12,768 | 3% | 4 | |
| 41 (41) | ![]() | You Were Never Really Here (2018) | £402 | £1,003 | £1,031,586 | 68% | 14 |
| 42 (re) | ![]() | Ready Player One (2018) | £361 | £361 | £16,114,011 | re | 11 |
| 43 (40) | New Town Utopia (2018) | £254 | £254 | £10,668 | 39% | 6 | |
| 44 (39) | Monster Family (2018) | £230 | £280 | £360,103 | 7% | 16 | |
| 45 (re) | ![]() | Macbeth: NT Live 2018 (2018) | £164 | £164 | £497,897 | re | 5 |
| 46 (re) | Akram Khan's Giselle: ENB 2017 (2018) | £120 | £120 | £108,800 | re | 3 | |
| 47 (re) | The Dam Busters At 75 Live From the Royal Albert Hall (2018) | £114 | £114 | £556,723 | re | 3 | |
| 48 (re) | ![]() | Paddington 2 (2017) | £20 | £20 | £42,642,866 | re | 30 |