London is no - it's definitely more of a fall/winter night frag because of its tobacco/leather/mossinness.
I think Brit is a lighter one that should be alright for spring/summer.
In general for spring/summer, look for fragrances that use terms like "marine" or "aqua" in their descriptions or profiles. I really like my Nautica Voyage - it's inexpensive, has a long staying power, and projects decently well. Oh, and it smells really good and clean. Chicks dig it