| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (1) |  | Santa Claus: The Movie (1985) | £661,696 | £1,002,469 | £3,183,789 | -57% | 3 |
| 2 (2) |  | Back to the Future (1985) | £567,498 | £766,122 | £1,401,117 | -11% | 2 |
| 3 (new) |  | Legend (1985) | £318,132 | £318,132 | £318,132 | new | 1 |
| 4 (5) |  | Red Sonja (1985) | £106,379 | £132,996 | £451,486 | 0% | 3 |
| 5 (3) |  | The Goonies (1985) | £88,530 | £104,236 | £584,089 | -55% | 3 |
| 6 (4) |  | Cocoon (1985) | £86,874 | £116,571 | £3,287,498 | -22% | 14 |
| 7 (6) |  | My Beautiful Laundrette (1985) | £61,845 | £91,722 | £880,232 | -40% | 5 |
| 8 (8) |  | Plenty (1985) | £46,964 | £70,142 | £494,583 | -50% | 4 |
| 9 (7) |  | Turtle Diary (1985) | £31,892 | £41,460 | £221,191 | -68% | 2 |
| 10 (10) |  | Prizzis Honor (1985) | £27,346 | £48,591 | £652,842 | -50% | 5 |
| 11 (11) | | Cat's Eye (1985) | £15,933 | £28,520 | £659,375 | -62% | 6 |
| 12 (9) |  | Letter to Brezhnev (1985) | £13,524 | £22,286 | £915,772 | -80% | 5 |
| 13 (12) |  | Weird Science (1985) | £13,438 | £15,050 | £609,655 | -57% | 7 |
| 14 (14) |  | Mad Max Beyond Thunderdome (1985) | £8,024 | £12,437 | £1,366,361 | -50% | 9 |
| 15 (15) |  | The Black Cauldron (1985) | £4,083 | £5,920 | £1,090,415 | -33% | 10 |