A ladybird beetle with almost all-yellow elytra: one of the many colour variants of Harmonia axyridis (Coleoptera: Coccinellidae).
This one has small irregular black spots:
And these two have larger ones:
Note that the strength of the black markings on the white scutum and head (which are white) seem to be unrelated to the size of the spots on the elytra.
First and third photos taken in Whiteknights Park, Reading, UK, on 2013-07-20 and second photo taken in Whiteknights Park on 2010-07-04.