| Rank | Title | Weekend |
|---|---|---|
| 1 | Piranha / 1978 | £249,233 |
| 2↔ (2) | Heaven Can Wait / 1978 | £63,117 |
| 3↓ (1) | Force 10 From Navarone / 1978 | £46,582 |
| 4↓ (3) | Death On the Nile / 1978 | £31,097 |
| 5↓ (4) | The Cat From Outer Space / 1978 | £24,583 |
| 6↓ (5) | Power Play / 1978 | £9,327 |
| 7↓ (6) | Grease / 1978 | £8,592 |
| 8↓ (7) | The Driver / 1978 | £2,616 |
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