| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | Peter Rabbit (2018) | £3,152,269 | £10,579,896 | £32,223,317 | -44% | 4 |
| 2 (new) |  | A Quiet Place () | £2,696,892 | £2,696,892 | £2,696,892 | new | 1 |
| 3 (2) |  | Ready Player One (2018) | £2,395,663 | £6,370,646 | £11,483,687 | -53% | 2 |
| 4 (new) |  | Love, Simon (2018) | £1,179,593 | £1,179,593 | £1,179,593 | new | 1 |
| 5 (3) |  | Isle of Dogs (2018) | £849,934 | £2,297,705 | £3,939,214 | -48% | 2 |
| 6 (5) |  | Black Panther (2018) | £684,430 | £2,378,104 | £49,089,752 | -34% | 8 |
| 7 (6) |  | The Greatest Showman (2017) | £676,711 | £2,004,015 | £43,498,143 | -17% | 15 |
| 8 (new) |  | Ghost Stories () | £591,787 | £591,787 | £591,787 | new | 1 |
| 9 (4) |  | Blockers () | £554,846 | £1,571,511 | £2,921,138 | -59% | 2 |
| 10 (8) | | Duck Duck Goose () | £506,520 | £1,608,390 | £2,262,222 | -23% | 2 |
| 11 (7) |  | Pacific Rim Uprising (2018) | £261,314 | £912,404 | £4,073,269 | -60% | 3 |
| 12 (10) |  | A Wrinkle In Time (2018) | £239,537 | £902,775 | £2,365,210 | -38% | 3 |
| 13 (9) |  | Tomb Raider (2018) | £208,397 | £723,916 | £7,450,533 | -63% | 4 |
| 14 (new) |  | Death Wish (2018) | £156,795 | £156,795 | £156,795 | new | 1 |
| 15 (new) |  | Giselle: Bolshoi 2018 () | £124,824 | £124,824 | £124,824 | new | 1 |
| 16 (new) | | 120 Bpm (2018) | £76,509 | £76,509 | £76,509 | new | 1 |
| 17 (16) |  | Early Man () | £54,036 | £291,435 | £10,991,346 | -55% | 11 |
| 18 (new) |  | Thoroughbreds () | £50,811 | £50,811 | £50,811 | new | 1 |
| 19 (new) | | Michael Inside () | £43,310 | £43,310 | £43,310 | new | 1 |
| 20 (17) |  | Red Sparrow (2018) | £42,680 | £113,119 | £6,323,839 | -62% | 6 |
| 21 (18) |  | Three Billboards Outside Ebbing, Missouri () | £38,841 | £124,427 | £15,012,807 | -55% | 13 |
| 22 (new) |  | Blackmail (2018) | £31,687 | £31,687 | £31,687 | new | 1 |
| 23 (new) | | Wonderstruck () | £30,642 | £30,642 | £30,642 | new | 1 |
| 24 (19) |  | Finding Your Feet (2018) | £28,943 | £113,778 | £5,436,523 | -55% | 7 |
| 25 (new) |  | Subedar Joginder Singh () | £28,343 | £28,343 | £28,343 | new | 1 |
| 26 (new) |  | The Hurricane Heist (2018) | £23,348 | £23,348 | £23,348 | new | 1 |
| 27 (re) |  | Macbeth: ROH London 2017/18 (2018) | £21,041 | £21,041 | £370,143 | re | 1 |
| 28 (26) | | Wind In the Willows: The Musical () | £18,656 | £55,969 | £69,376 | 28% | 2 |
| 29 (new) |  | Maya the Bee: The Honey Games (2018) | £18,045 | £18,045 | £18,045 | new | 1 |
| 30 (24) |  | Darkest Hour (2018) | £16,758 | £57,793 | £23,982,903 | -27% | 13 |
| 31 (23) |  | Mary Magdalene (2018) | £12,541 | £57,211 | £743,451 | -68% | 4 |
| 32 (22) |  | You Were Never Really Here () | £10,933 | £43,865 | £975,983 | -74% | 5 |
| 33 (30) | | Monster Family (2018) | £6,574 | £13,583 | £341,597 | 47% | 6 |
| 34 (20) |  | Journeyman () | £5,710 | £38,601 | £98,850 | -91% | 2 |
| 35 (37) | | Julius Caesar: NT Live 2018 () | £3,568 | £7,719 | £572,046 | 63% | 3 |
| 36 (39) |  | Journeys End () | £3,292 | £5,471 | £508,409 | 62% | 10 |
| 37 (27) |  | Westwood: Punk, Icon, Activist (2018) | £3,287 | £13,461 | £101,984 | -58% | 3 |
| 38 (29) |  | Phantom Thread () | £2,872 | £16,449 | £2,685,862 | -34% | 10 |
| 39 (34) | | My Generation (2018) | £2,447 | £5,542 | £280,253 | 19% | 4 |
| 40 (41) |  | Paddington 2 (2017) | £2,292 | £6,272 | £42,637,950 | 65% | 22 |
| 41 (35) | | Gholam () | £2,151 | £3,203 | £8,783 | 10% | 3 |
| 42 (re) | | The Islands and the Whales (2018) | £2,118 | £2,118 | £7,690 | re | 1 |
| 43 (33) |  | The Mercy (2018) | £1,576 | £5,886 | £861,999 | -33% | 9 |
| 44 (32) | | Walk Like a Panther () | £1,191 | £3,355 | £190,733 | -51% | 5 |
| 45 (28) | | Messiah From Bristol Old Vic 2018 () | £683 | £7,273 | £95,355 | -86% | 2 |
| 46 (new) |  | I Kill Giants (2018) | £571 | £571 | £571 | new | 1 |
| 47 (36) | | Dark River () | £552 | £2,783 | £108,457 | -69% | 6 |
| 48 (re) | | Twelfth Night: RSC Live 2018 (2018) | £286 | £286 | £634,299 | re | 4 |
| 49 (re) |  | The Beatles: Eight Days a Week - The Touring Years () | £201 | £201 | £1,187,103 | re | 13 |
| 50 (new) | | Rajaratha (2018) | £152 | £152 | £152 | new | 1 |
| 51 (31) | | Psycho Vertical (2018) | £148 | £2,040 | £6,828 | -94% | 3 |