| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) | ![]() | Antz (1998) | £1,357,591 | £1,789,100 | £5,749,297 | -22% | 3 |
| 2 (2) | ![]() | Blade (1998) | £1,067,918 | £1,807,038 | £3,449,428 | -35% | 2 |
| 3 (new) | ![]() | Ronin (1998) | £875,545 | £875,545 | £875,545 | new | 1 |
| 4 (5) | ![]() | Small Soldiers (1998) | £304,437 | £354,815 | £5,403,088 | -22% | 5 |
| 5 (3) | ![]() | The Exorcist (1973) Rerelease | £282,404 | £499,173 | £6,746,085 | -54% | 51 |
| 6 (6) | ![]() | There's Something About Mary (1998) | £263,955 | £440,432 | £14,710,806 | -31% | 9 |
| 7 (7) | ![]() | Mulan (1998) | £238,650 | £270,566 | £8,335,693 | -30% | 7 |
| 8 (new) | ![]() | Rounders (1998) | £188,946 | £188,946 | £188,946 | new | 1 |
| 9 (4) | ![]() | Snake Eyes (1998) | £162,247 | £328,933 | £1,851,117 | -63% | 3 |
| 10 (9) | ![]() | The Truman Show (1998) | £146,191 | £251,431 | £9,621,152 | -48% | 7 |
| 11 (8) | ![]() | Hope Floats (1998) | £145,298 | £293,963 | £612,606 | -54% | 2 |
| 12 (new) | ![]() | Les Misérables (1998) | £118,564 | £118,564 | £118,564 | new | 1 |
| 13 (14) | ![]() | My Name Is Joe (1998) | £109,556 | £156,581 | £410,111 | 18% | 2 |
| 14 (11) | ![]() | Saving Private Ryan (1998) | £98,437 | £180,725 | £17,465,386 | -31% | 11 |
| 15 (15) | ![]() | Elizabeth (1998) | £12,604 | £12,604 | £5,292,690 | -29% | 8 |