| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | The Grinch (2018) | £5,019,677 | £5,019,677 | £5,019,677 | new | 1 |
| 2 (1) |  | Bohemian Rhapsody (2018) | £4,559,647 | £8,479,545 | £28,907,411 | -21% | 3 |
| 3 (new) |  | Widows (2018) | £2,409,112 | £2,409,112 | £2,409,112 | new | 1 |
| 4 (2) |  | A Star Is Born (2018) | £1,248,295 | £2,534,577 | £25,464,451 | -31% | 6 |
| 5 (3) |  | The Nutcracker and the Four Realms (2018) | £1,115,243 | £1,681,322 | £3,414,557 | -36% | 2 |
| 6 (new) |  | Overlord (2018) | £677,844 | £677,844 | £677,844 | new | 1 |
| 7 (new) | | Thugs of Hindostan (2018) | £497,663 | £497,663 | £497,663 | new | 1 |
| 8 (5) |  | Johnny English Strikes Again (2018) | £477,937 | £702,504 | £17,081,899 | -54% | 6 |
| 9 (4) |  | Smallfoot (2018) | £360,893 | £474,833 | £10,649,144 | -68% | 5 |
| 10 (18) |  | They Shall Not Grow Old (2018) | £271,302 | £271,302 | £1,133,754 | 87% | 4 |
| 11 (6) |  | Goosebumps 2: Haunted Halloween (2018) | £246,906 | £325,221 | £7,434,677 | -72% | 4 |
| 12 (7) |  | Halloween (2018) | £228,185 | £553,952 | £8,725,496 | -71% | 4 |
| 13 (8) |  | Venom (2018) | £191,476 | £375,050 | £19,907,988 | -62% | 6 |
| 14 (re) | | Sarkar 3 (2018) | £174,364 | £174,364 | £227,617 | RE | 2 |
| 15 (10) |  | Peterloo (2018) | £151,472 | £378,050 | £726,747 | -57% | 2 |
| 16 (new) | | Squadron 303 (2018) | £120,640 | £120,640 | £120,640 | new | 1 |
| 17 (new) | | La Sylphide: Bolshoi Ballet 2018 (2018) | £100,005 | £100,005 | £100,005 | new | 1 |
| 18 (new) | | Marnie: Met Opera 2018 (2018) | £82,019 | £82,019 | £82,019 | new | 1 |
| 19 (new) | | Wildlife (2018) | £67,968 | £67,968 | £67,968 | new | 1 |
| 20 (new) | | Exhibition On Screen: Degas Passion For Perfection (2018) | £50,075 | £50,075 | £50,075 | new | 1 |
| 21 (31) |  | Christopher Robin (2018) | £25,617 | £29,721 | £14,812,501 | 81% | 13 |
| 22 (9) |  | Slaughterhouse Rulez (2018) | £23,043 | £160,081 | £557,873 | -94% | 2 |
| 23 (25) |  | Funny Girl: The Musical (2018) | £15,616 | £32,651 | £605,450 | 23% | 3 |
| 24 (21) |  | Allelujah: NT Live 2018 (2018) | £14,380 | £106,655 | £781,744 | -36% | 2 |
| 25 (17) | | Juliet, Naked (2018) | £13,114 | £52,163 | £103,976 | -75% | 2 |
| 26 (32) | | Sgt. Stubby: An Unlikely Hero (2018) | £12,547 | £14,241 | £137,476 | 70% | 13 |
| 27 (19) |  | The Wife (2018) | £9,082 | £44,991 | £1,619,633 | -68% | 7 |
| 28 (26) |  | Cold War (2018) | £5,117 | £14,495 | £1,121,934 | -52% | 11 |
| 29 (23) | | Nae Pasaran! (2018) | £4,743 | £21,072 | £36,663 | -70% | 2 |
| 30 (20) |  | Sherlock Gnomes (2018) | £4,593 | £4,667 | £9,482,718 | -82% | 27 |
| 31 (27) |  | King of Thieves (2018) | £3,619 | £22,433 | £6,006,979 | -65% | 9 |
| 32 (38) |  | The Little Stranger (2018) | £2,882 | £9,072 | £778,559 | 56% | 8 |
| 33 (35) |  | Mamma Mia! Here We Go Again (2018) | £2,693 | £4,201 | £65,520,195 | 14% | 17 |
| 34 (47) |  | The Children Act (2018) | £1,587 | £36,707 | £2,856,442 | 90% | 12 |
| 35 (new) | | Kin (2018) | £1,526 | £1,526 | £1,526 | new | 1 |
| 36 (re) | | MGC Presents Red (2018) | £1,002 | £1,002 | £34,201 | RE | 1 |
| 37 (new) | | Won't You Be My Neighbor (2018) | £908 | £908 | £908 | new | 1 |
| 38 (29) |  | Cliff Richard Live 60th Anniversary Tour (2018) | £784 | £3,698 | £1,215,040 | -90% | 5 |
| 39 (re) | | Matangi / Maya / M.I.A. (2018) | £530 | £530 | £134,510 | RE | 7 |
| 40 (re) | | Hurricane (2018) | £400 | £400 | £131,174 | RE | 8 |
| 41 (33) |  | Possum (2018) | £216 | £1,074 | £17,975 | -93% | 3 |
| 42 (34) |  | Matriarch (2018) | £191 | £1,863 | £4,266 | -92% | 2 |
| 43 (41) | | Nureyev (2018) | £140 | £750 | £75,125 | -86% | 8 |
| 44 (re) | | HYMN Sarah Brightman In Concert (2018) | £119 | £119 | £8,783 | RE | 1 |
| 45 (44) | | Grace and Goliath (2018) | £61 | £147 | £14,770 | -90% | 6 |
| 46 (new) | | Bros: After the Screaming Stops (2018) | £49 | £49 | £49 | new | 1 |
| 47 (39) | | The Intent 2: The Come Up (2018) | £36 | £525 | £441,760 | -97% | 8 |
| 48 (51) |  | Mission:Impossible - Fallout (2018) | £15 | £2,209 | £24,395,943 | -46% | 16 |