@jussipekonen Oh yes, I’ve been 5 or 6 times - still not seen all of it!
The parks in London are lovely - for a large city it has a lot of green space, both large and small. The Green Park/St James’ Park area was always my go-to for a picnic/stroll. Partly helped by having a friend who was a member of one of the clubs overlooking Green Park. A stroll, then smoked salmon sandwiches and a jug of Pimms in the club garden. As you do. 😂