My answers, paying no mind to the OP's request for European shopping:
Solder: Kester 60/40, .031", which is like .8mm
Desoldering: Engineer SS-02 Solder Sucker. Also, whatever copper braid came with my soldering iron kit.
Wire: Smallbear 24AWG and 22AWG pre-bonded, or 22AWG solid. I have uses...