If you're looking for low-fare carriers:
Easyjet flies from Zurich to the Luton and Gatwick airports in London, and from Geneva to Paris (Orly), Nice, Barcelona, Amsterdam and Liverpool, East Midlands, Gatwick and Luton in the UK.
BMIbaby flies between Geneva and East Midlands, Cardiff, Teesside and Manchester (all UK locations)
Ryanair does not fly from or to Switzerland.
Air Berlin flies from Zurich to 5 German Cities: Berlin, Hamburg, Dortmund, Dusseldorf and Monchengladbach.
Germanwings flies from Zurich to Koln/Bonn.
Virgin Express flies between Brussels and Geneva
I'm surely missing some others ...