| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (3) |  | Lock, Stock & Two Smoking Barrels (1998) | £1,147,448 | £2,000,026 | £2,941,664 | 18% | 2 |
| 2 (4) |  | The Horse Whisperer (1998) | £815,302 | £1,672,355 | £2,607,990 | -13% | 2 |
| 3 (2) |  | Armageddon (1998) | £796,753 | £1,651,542 | £14,166,197 | -22% | 5 |
| 4 (1) |  | The X Files (1998) | £772,807 | £1,686,348 | £6,794,394 | -35% | 3 |
| 5 (5) |  | Doctor Dolittle (1998) | £763,425 | £1,752,012 | £16,770,055 | -13% | 6 |
| 6 (new) |  | Species II (1998) | £391,868 | £391,868 | £391,868 | new | 1 |
| 7 (6) |  | Lost In Space (1998) | £237,895 | £759,497 | £10,182,308 | -25% | 6 |
| 8 (7) |  | Godzilla (1998) | £144,492 | £328,285 | £15,638,201 | -11% | 8 |
| 9 (new) |  | The Last Days of Disco (1998) | £93,255 | £93,255 | £93,255 | new | 1 |
| 10 (8) |  | The Spanish Prisoner (1998) | £78,485 | £144,749 | £223,652 | -1% | 2 |
| 11 (new) |  | The Land Girls (1998) | £75,474 | £75,474 | £75,474 | new | 1 |
| 12 (11) |  | The Wedding Singer (1998) | £51,982 | £103,192 | £9,128,974 | -12% | 14 |
| 13 (10) |  | Dil Se (1998) | £47,128 | £96,137 | £320,773 | -29% | 2 |
| 14 (new) |  | He Got Game (1998) | £42,999 | £42,999 | £42,999 | new | 1 |
| 15 (12) |  | Barneys Great Adventure (1998) | £39,688 | £105,282 | £2,190,931 | 4% | 11 |