25 - but I'll finally get to knock off some of the US ones next year. I've at least been to all the Australian ones.
I'm glad they included Winchester Cathedral. I haven't been to the others.
An odd thing happened at Winchester Cathedral. We arrived, had a look around and then joined a tour of the cathedral and crypt, during which a goodly number of photos were taken. When we checked later, there was not a single photo of Winchester, cathedral or town. Bizarre!
+ 2 - I missed 2