"Should you ever meet a film director scouring the capital for a perfect Victorian street scene in which to set his latest costume drama, do recommend Barkham Street. There is just one snag - it is not in London. Barkham Street was built - by both mistake and design - 128 miles away in remotest Lincolnshire." Daily Telegraph By Peter Chapman 07 Oct 2000
So what is the connection with Bethlem Hospital, read on...
Unfortunately, at the time of posting the original article by Peter Chapman is no longer available online. A copy from the internet archive can be read here.
Barkham Street - Wainfleet
Bethlem Hospital - London (Google Maps)