We'd come up to Lancaster to help celebrate a double "significant birthday" and took the opportunity to nab a few caches while we were here. Collected two challenge caches that I'd long since qualified for but never, until now, been close too. Filled in a few holes towards qualifying for "Challenge cache - The Well Travelled Cacher GB" http://coord.info/GC3CZ5H and did a few others just because they were there.
Well, at GZ there were two obvious places to investigate and I initially guessed wrong, but soon had the cache in hand. See the FTF tab on my profile page for a list of qualifying caches.