As we approached the GZ we saw a muggle family coming in the opposite direction. So we had to walk on past. When they had gone we returned. I chose the wrong tree but even before I moved on Bobcat was shouting out that he'd found it. That makes today's find score 6-3 in my favour.
I have used Project-GC to see if I qualify for this challenge and I do.
I have found the following qualifying caches
GC56E4 - The London Rainbow Cache 4 - Green (type=Virtual Cache)
GC56E9 - The London Rainbow Cache 7 - Violet (type=Virtual Cache)
GC56E7 - The London Rainbow Cache 6 - Indigo (type=Virtual Cache)
GCE387 - The Palace of Westminster (Houses of Parliament) (type=Virtual Cache)
GC56E5 - The London Rainbow Cache 5 - Blue (type=Virtual Cache)
That is a total of 5 caches during 2013-07-12