| Title | Weekend | Week | Total | % Change | Total Weeks |
| 1 (2) |  | Santa Claus: The Movie (1985) | £1,521,900 | £1,978,470 | £2,181,320 | 87% | 2 |
| 2 (new) |  | Back to the Future (1985) | £634,995 | £634,995 | £634,995 | new | 1 |
| 3 (3) |  | The Goonies (1985) | £197,059 | £285,736 | £479,853 | 1% | 2 |
| 4 (1) |  | Cocoon (1985) | £111,923 | £162,288 | £3,170,927 | -45% | 13 |
| 5 (4) |  | Red Sonja (1985) | £105,947 | £153,623 | £318,490 | -36% | 2 |
| 6 (6) |  | My Beautiful Laundrette (1985) | £102,767 | £138,735 | £788,510 | -26% | 4 |
| 7 (re) |  | Turtle Diary (1985) | £99,731 | £99,731 | £179,731 | re | 1 |
| 8 (8) |  | Plenty (1985) | £93,928 | £136,196 | £424,441 | 6% | 3 |
| 9 (5) |  | Letter to Brezhnev (1985) | £67,047 | £93,866 | £893,486 | -56% | 4 |
| 10 (7) |  | Prizzis Honor (1985) | £54,692 | £73,834 | £604,251 | -39% | 4 |
| 11 (9) | | Cat's Eye (1985) | £41,425 | £60,066 | £630,855 | -33% | 5 |
| 12 (10) |  | Weird Science (1985) | £30,907 | £44,815 | £594,605 | -29% | 6 |
| 13 (11) |  | St. Elmo's Fire (1985) | £18,711 | £24,324 | £808,240 | -50% | 6 |
| 14 (12) |  | Mad Max Beyond Thunderdome (1985) | £16,048 | £20,862 | £1,353,924 | -50% | 8 |
| 15 (13) |  | The Black Cauldron (1985) | £6,124 | £7,961 | £1,084,495 | -33% | 9 |