Turtle update

I posted  photos yesterday of the Kenilworth Aquatic Garden walk and thought something was missing this morning and checked my camera's memory card to confirm my suspicion, sure enough the huge turtle I saw on the edge of a lily pond sunning it's self was still there but not in my post. I downloaded it and decided to do an update because it was so big and had such long claws. I don't know what type of turtle this is anyone have an idea what it is?
It was as big as a dinner plate and the others were only bread plate sized out on the logs sunning. The big turtle gets it's day in the sun.

For you to compare here is the smaller painted turtle again: