In reply to Welsh Kate:
> (In reply to m0unt41n)
> ...Paramo .... a waterproofing system that still works...
From my experience, and that of a number of other people I know, I don't think many would consider Paramo to actually be waterproof. If I was being generous, I'd describe it as a pretty water resistant softshell.
If you don't mind being warm and wet, that it's OK, but for a typical British summer, accepting the limitations on "breathability" of a membrane waterproof will probably help keep you dryer.