| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Solo: A Star Wars Story (2018) | £3,147,338 | £7,846,175 | £13,907,406 | -48% | 2 |
| 2 (2) | ![]() | Deadpool 2 (2018) | £2,530,069 | £6,019,197 | £26,701,776 | -33% | 3 |
| 3 (3) | ![]() | Avengers: Infinity War (2018) | £1,058,425 | £2,685,637 | £68,824,457 | -13% | 6 |
| 4 (4) | ![]() | Sherlock Gnomes (2018) | £938,672 | £2,772,517 | £7,116,136 | 27% | 4 |
| 5 (new) | ![]() | Book Club (2018) | £720,858 | £720,858 | £720,858 | new | 1 |
| 6 (5) | ![]() | Show Dogs (2018) | £601,535 | £1,668,452 | £2,214,857 | 9% | 2 |
| 7 (6) | ![]() | I Feel Pretty (2018) | £255,587 | £595,206 | £5,062,342 | -8% | 5 |
| 8 (7) | ![]() | Blade Runner (1982) Rerelease | £213,737 | £314,829 | £3,013,001 | -6% | 16 |
| 9 (new) | Veere Di Wedding (2018) | £211,424 | £211,424 | £211,424 | new | 1 | |
| 10 (8) | ![]() | On Chesil Beach (2018) | £129,206 | £334,777 | £623,127 | -24% | 3 |
| 11 (10) | ![]() | Life of the Party (2018) | £113,800 | £250,998 | £1,660,250 | 1% | 4 |
| 12 (9) | ![]() | Peter Rabbit (2018) | £100,055 | £281,426 | £40,625,592 | -15% | 12 |
| 13 (new) | ![]() | Carry On Jatta 2 (2018) | £99,498 | £99,498 | £99,498 | new | 1 |
| 14 (27) | ![]() | 2001: A Space Odyssey (1968) Rerelease | £91,171 | £-62,977 | £318,236 | 94% | 31 |
| 15 (re) | ![]() | The Greatest Showman (2017) | £90,895 | £90,895 | £46,713,317 | re | 21 |
| 16 (new) | L'amant Double (2018) | £59,525 | £59,525 | £59,525 | new | 1 | |
| 17 (14) | Edie (2018) | £39,305 | £113,080 | £181,635 | -43% | 2 | |
| 18 (new) | My Friend Dahmer (2018) | £37,940 | £37,940 | £37,940 | new | 1 | |
| 19 (17) | ![]() | The Guernsey Literary and Potato Peel Pie Society (2018) | £37,172 | £102,931 | £5,625,119 | 7% | 7 |
| 20 (20) | ![]() | Lean On Pete (2018) | £10,403 | £32,384 | £347,604 | -49% | 5 |
| 21 (new) | ![]() | Ismaels Ghost (2018) | £9,048 | £9,048 | £9,048 | new | 1 |
| 22 (new) | ![]() | Bobby Robson More Than a Manager (2018) | £8,887 | £8,887 | £8,887 | new | 1 |
| 23 (24) | ![]() | Isle of Dogs (2018) | £8,227 | £24,290 | £5,973,931 | -7% | 10 |
| 24 (new) | That Summer! (2018) | £7,568 | £7,568 | £7,568 | new | 1 | |
| 25 (23) | ![]() | Entebbe (2018) | £7,175 | £20,175 | £290,580 | -19% | 4 |
| 26 (new) | Bhavesh Joshi Superhero (2018) | £5,133 | £5,133 | £5,133 | new | 1 | |
| 27 (22) | Funny Cow (2018) | £4,946 | £20,601 | £496,157 | -52% | 7 | |
| 28 (new) | ![]() | The Bromley Boys (2018) | £3,230 | £3,230 | £3,230 | new | 1 |
| 29 (30) | ![]() | Beast (2018) | £3,030 | £7,716 | £399,523 | -29% | 5 |
| 30 (new) | The Public Image Is Rotten (2018) | £2,375 | £2,375 | £2,375 | new | 1 | |
| 31 (31) | An American In Paris: The Musical (2018) | £1,910 | £10,196 | £748,875 | -55% | 3 | |
| 32 (35) | That Good Night (2018) | £1,719 | £5,509 | £35,348 | -18% | 3 | |
| 33 (32) | ![]() | Ready Player One (2018) | £1,706 | £11,178 | £16,112,689 | -39% | 10 |
| 34 (34) | ![]() | Finding Your Feet (2018) | £1,672 | £10,971 | £5,725,612 | -30% | 15 |
| 35 (16) | ![]() | Exhibition On Screen: I Claude Monet 2018 (2017) | £1,411 | £11,486 | £46,149 | -96% | 2 |
| 36 (39) | ![]() | Macbeth: NT Live 2018 (2018) | £595 | £3,837 | £494,633 | -39% | 4 |
| 37 (re) | A Cambodian Spring (2018) | £461 | £461 | £9,856 | re | 2 | |
| 38 (15) | Mckellen Playing the Part Live 2018 (2018) | £359 | £1,923 | £43,033 | -99% | 2 | |
| 39 (33) | ![]() | Tea With the Dames (2018) | £340 | £1,989 | £180,021 | -87% | 4 |
| 40 (re) | ![]() | Journeyman (2018) | £330 | £330 | £126,626 | re | 9 |
| 41 (29) | ![]() | Early Man (2018) | £240 | £7,454 | £11,178,084 | -95% | 19 |
| 42 (41) | ![]() | Ghost Stories (2018) | £234 | £1,636 | £1,644,457 | -60% | 9 |
| 43 (42) | ![]() | You Were Never Really Here (2018) | £136 | £1,467 | £1,030,117 | -56% | 12 |
| 44 (45) | Monster Family (2018) | £118 | £222 | £359,565 | 40% | 14 | |
| 45 (44) | ![]() | Paddington 2 (2017) | £56 | £84 | £42,642,710 | -30% | 29 |