What Clive said, for the plane journey to work out cheaper it needs to be at least £40 cheaper then the train when travelling from central London and I doubt it'll be any quicker unless you live right next to the airport.
@jaw started
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What Clive said, for the plane journey to work out cheaper it needs to be at least £40 cheaper then the train when travelling from central London and I doubt it'll be any quicker unless you live right next to the airport.