| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | Saving Private Ryan (1998) | £2,704,522 | £2,704,522 | £2,704,522 | new | 1 |
| 2 (1) |  | Lock, Stock & Two Smoking Barrels (1998) | £1,041,017 | £1,822,660 | £4,764,324 | -9% | 3 |
| 3 (2) |  | The Horse Whisperer (1998) | £547,368 | £1,165,153 | £3,773,143 | -33% | 3 |
| 4 (5) |  | Doctor Dolittle (1998) | £505,105 | £770,077 | £17,540,132 | -34% | 7 |
| 5 (3) |  | Armageddon (1998) | £504,770 | £909,792 | £15,075,989 | -37% | 6 |
| 6 (4) |  | The X Files (1998) | £421,644 | £845,226 | £7,639,620 | -45% | 4 |
| 7 (6) |  | Species II (1998) | £134,696 | £328,412 | £720,280 | -66% | 2 |
| 8 (7) |  | Lost In Space (1998) | £124,051 | £219,693 | £10,402,001 | -48% | 7 |
| 9 (8) |  | Godzilla (1998) | £85,160 | £127,478 | £15,765,679 | -41% | 9 |
| 10 (9) |  | The Last Days of Disco (1998) | £70,341 | £127,802 | £221,057 | -25% | 2 |
| 11 (new) |  | Cousin Bette (1998) | £44,082 | £44,082 | £44,082 | new | 1 |
| 12 (11) |  | The Land Girls (1998) | £44,046 | £107,039 | £182,513 | -42% | 2 |
| 13 (10) |  | The Spanish Prisoner (1998) | £38,260 | £87,388 | £311,040 | -51% | 3 |
| 14 (13) |  | Dil Se (1998) | £34,057 | £47,427 | £368,200 | -28% | 3 |
| 15 (12) |  | The Wedding Singer (1998) | £28,565 | £63,814 | £9,192,788 | -45% | 15 |