Blimey, a lot of £ for a senior woman, unless that's your particular thing!?
There are plenty of other (younger) options in and arnd London for that rate or less £, would never get involved or ever have in paying a deposit anyway
Reminds me a bit of the sort of woman (ie middle aged)who used to be at "singles" things I went to after last long term relationship late 90's early 00's when I was in my mid 40's, before I decided it was a WOT and took up punting!