I found a single key on a key ring with a whistle and an entry fob.
(Bob on 22 Sept 2022)
When: 06 Apr 2023
Where: Battersea Park(51.4791° N, 0.1565° W)
Strong prescription Ollie Quinn sunglasses in brown tan case. Sunglasses are of a clear frame with brown tinted lenses.
Could one of these be yours?