When This Time was filmed (last May?)).
May and June, I believe. A couple of jurnos were invited to Wimbledon Studios to see some of the studio scenes being recorded, and they commented how hot it was outside, and rather stuffy inside the studio.
You can date a couple of the shots in the opening titles. The one of Jennie getting out of the taxi, which is in front of the anti vehicle barriers at BH, looking down Portland Place. There's bunting up across the roadway, so that was around the time of Prince Harry and Megan's wedding last May.
Would like to see the reason the air date slipped from the press release, which indicated it would air in the Autumn last year. Wonder if Steve having to do all the pre-publicity interviews for 'Stan and Ollie' on both sides of the Atlantic would have caused a clash, if the BBC released it the series towards the end of last year?
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