We had a two and a half week stay in October-November. Anthony was a warm and responsive host by message -- we would have enjoyed meeting him. We met his daughter Beth only briefly, though she was our first contact on arrival and manages the flat, we believe.
The flat is located in a calm pocket five minutes walk from Finchley Road, a very noisy and gritty street but with many transport links (Jubilee and Metropolitan), big groceries and ethnic restaurants. A 10 minute walk the other way takes you to more attractive West End Lane where there are quick stop small groceries, a high end bakery (Lola's) and a typical cafe (Bridge Cafe) with a very reasonably priced breakfast and fish and chips, many more restaurants and a prettier neighborhood for walking.
On West End, you'll also find Thames Link rail station with a direct link to St. Pancras station (Eurostar etc) and the Jubilee line. If you are a good walker, crossing directly over Finchley Road and up the hill will take you fairly quickly (20-30 minutes) to Hampstead Village and the heath or to Belsize Village. The Overground -- with stations on both West End and Finchley Rd. will take you to Kew Gardens and Richmond very directly. Also note that the Camden Art Center across Finchley Road on the corner of Arkwright has a lovely cafe with excellent soup, salads, pastries etc.
The flat itself is comfortable with sufficient items for cooking on the good new gas cooker, good washing machine and sufficient drying racks for small loads of clothing. Even in damp weather, clothes dried fairly quickly. We were cosy in the flat, even though we never turned on the heat. Shower was good with plenty of hot water. The toilet takes a long time to refill, but works -- just be patient!
Beswick Mews is part of a former social housing estate and designed to calm traffic. It's a bit of a maze. There were lots of families around -- we heard other people sometimes, but this was pleasant in general.
Note: You can't see the flat #6 from the street. It's next to #8 and #10 which you can see from the bottom of the 12 stairs, but not from Lymington Rd. You can only see the sign for Beswick Mews from the road. Taxis and Uber will try to drive around into the Mews from the far end, but the access to the stairway for the flat is much closer from Lymington Rd., though down a few stairs from the road. The flat itself is up about 12 steps and doesn't have an attractive entrance -- but it's pleasant enough inside.