BritRail England FLEXI Mobile-Pass allows you to travel by train without restriction and without paying surcharges, throughout England. So Scotland and Wales are excluded. It is ideal for traveling freely for 3, 4, 8 or 15 days, of your choice, even non-consecutive days, within a month.
Cities such as Bath, Brighton, Cambridge, Carlisle, Durham, Exeter, Liverpool, London, Manchester, Oxford, Soouthampton, York, and many others are within easy reach.... train and at a reasonable cost.
Kids up to age 15 (16 and under) travel free! Maximum 1 child per adult. Children up to age 4 (5 not turned 5) always travel free and do not need a ticket.