Bunnyhop
http://www.youtube.com/watch?v=NTo7tbEeKn4
Spy have an icon above their head, those are your friendly spies.
As for concing. HH (handheld conc) seems easier for getting from point A to B. For dropping, lets say you are playing Openfire. You drop a conc in the water, you conc into the flag but at the same time you have another one prime. You get the flag and conc out. So it really depends on how you play really.
As for UK server, try the official server, filles up pretty quickly
As HW, I do no play HW so I fully do not understand that class.
There's no nades to avoid spam
Glad I saw you ingame
