Originally Posted by corporate-wage-slave

Thanks for the summary, makes it a lot easier! This is a 800km trip, or thereabouts, so that is 250€, but halved because you were less than 2 hours late. You can then argue about LGW v LHR if you want to (ie. argue the case for being more than 2 hours late), but having done that very precise trip - ferry across the lake and the train to ZRH - it's actually quite pleasant and very scenic, so you did well there, in my view. They should cover the £120 on top, plus any reasonable refreshments - and there is a very nice café on that ferry! - and communication costs.

This assumes that the reason for the flight being cancelled was lack of equipment/crew, which is what I think it was. If it was weather related (etc) then it's just the £120 and right of care aspects (food, drink, communications).