Where was Connecting Rooms filmed?

1970 film

Connecting Rooms (1970) was filmed in City of Westminster and Bayswater, 2 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

Places per Wikipedia's article

The Wikipedia article names 2 places. Each links to the sentence that says so.