| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (new) |  | King Kong (2005) | £6,944,740 | £6,944,740 | £6,944,740 | new | 1 |
| 2 (1) |  | The Chronicles of Narnia: The Lion the Witch and the Wardrobe (2005) | £4,798,576 | £8,320,487 | £17,204,598 | -46% | 2 |
| 3 (2) |  | Harry Potter and the Goblet of Fire (2005) | £1,022,452 | £1,770,229 | £42,317,710 | -52% | 5 |
| 4 (3) |  | Flightplan (2005) | £253,057 | £554,127 | £5,550,239 | -62% | 4 |
| 5 (new) |  | The Family Stone (2005) | £247,515 | £247,515 | £247,515 | new | 1 |
| 6 (new) |  | Lassie (2005) | £132,926 | £132,926 | £132,926 | new | 1 |
| 7 (9) |  | March of the Penguins (2005) | £125,620 | £242,543 | £426,341 | -32% | 2 |
| 8 (re) |  | The Polar Express (2004) | £93,328 | £93,328 | £10,167,005 | RE | 8 |
| 9 (new) | | Bluffmaster (2005) | £85,437 | £85,437 | £85,437 | new | 1 |
| 10 (8) |  | The Constant Gardener (2005) | £82,454 | £203,564 | £4,417,798 | -56% | 6 |
| 11 (5) |  | The Exorcism of Emily Rose (2005) | £77,537 | £218,689 | £3,575,342 | -77% | 4 |
| 12 (7) |  | Mrs. Henderson Presents (2005) | £63,694 | £273,858 | £2,788,162 | -69% | 4 |
| 13 (4) |  | Keeping Mum (2005) | £62,644 | £244,456 | £1,600,801 | -82% | 3 |
| 14 (6) |  | Doom (2005) | £45,338 | £167,242 | £1,309,725 | -83% | 3 |
| 15 (11) |  | Neal 'n' Nikki (2005) | £35,680 | £103,336 | £163,411 | -41% | 2 |