Where was The Five Doctors filmed?

1983 Doctor Who 20th Anniversary Special Story directed by Richard Martin Pennant Roberts Peter Moffatt John Nathan-Turner

The Five Doctors (1983) was filmed in Middlesex, Uxbridge, Ealing Studios and Llanbedr, 4 places named in its Wikipedia article, in the United Kingdom. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data