If you go home regularly on the train after 7pm it will save you a considerable amount of money if you get a peak-fare carnet for the morning and an off-peak one for the evening.

BBC: More ways to save money on train fares

Manuel Cortes, leader of the TSSA transport workers' union, said the select committee report was "the clearest warning to ministers against going down the route of rationing rail travel by pricing passengers off trains through super peak-fare tickets".

BBC: Higher peak-time rail fares opposed

The cheapest time to buy that peak-period fare: April.

WSJ: Finding the Best Fares to Europe