The Jetty, on BBC iPlayer, was also worth a watch.

I haven't seen but have read that the lake is Hollingworth Lake near Rochdale - where Sue goes to Lunch on a Friday.
It is indeed, whilst the story it set in Lancashire most of the filming locations are Yorkshire.
I agree. We were asked to believe on Sunday, that the Czar of all the Russias on a visit to London (which the expert said in fact never happened), gave to an ancestor, a servant, a Fabergé gold and diamond brooch, as a thank you for his good service, rather than the more customary five bob.
We are watching that one as well Gloria.