Where was Great Expectations (1989–1991) filmed?
1989 TV miniseries
Great Expectations (1989–1991) was filmed in Isle of Sheppey, Upnor and Harty, 3 places named in its Wikipedia article's Locations section, 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.
Places per Wikipedia's Locations section
Wikipedia’s Locations section names 3 places. Each links to the sentence that says so.

