Updates to GWR ticket restrictions

[embers25]

With the new GWR timetable it looks like some changes to ticket validity times have been made, but restrictions from Dawlish and Exeter to London appear to have not been input correctly. They still refer to the old XC times and the restriction on Off Peak tickets allow travel from Dawlish on the 0745 but this train is not valid with ticket from Exeter (despite journey planners saying it is). Surely someone should check these things, given such a major change.