Originally Posted by
Ldnn1
However, you could be onto something if OP looks at CE. It's possible that FCO-LHR in I class with a throwaway (or indeed a useful) return somewhere might be cheaper than any of the Y fares available.
Yes, that may be an idea, a possible solution would be to find a return - which need not be in CE, and need not involve Italy either - but does involve LON and meets the Saturday night rule. There was a Vueling / BA codeshared LTN-AMS service which was often very cheap, but that is just a suggestion.