Correct............

I meant to mention cost was a consideration!! I am positive it would have cost a lot more to transport and keep a crew etc to the Scillies than it would to do so to Dumfries and Galloway. As you would imagine if you have seen the film - it was not expensive to produce. The cost without principal artistes salaries was £320,000+ -it came in £8000+ over budget. This at 1972 prices.

The Summer Isles - which is where I assume they took the name - are off Achiltibuie, N.West Scotland - www.multimap.com will take you there.

The film was almost completely filmed in seven weeks in the Dumfries and Galloway area of South West Scotland. There was no island - it's trick photography! The rooms where Britt Ekland tried to seduce Edward Woodward and Edward Woodward refused her were 30 miles apart! There was a small amount of scenery filming done in Plockton in the North West of Scotland.

At the risk of thread drift - another programme filmed in the area over the past few years was "Two Thousand Acres of Sky". Although this was again supposed to be an island in fact one end (the island if you like) was Port Logan, the other was Portpatrick. See:
http://www.bbc.co.uk/drama/sky/

Trick photography again.