brianleach wrote: I intended to take the bike from Winchester to Castle Cary and then cycle to Glastonbury. On enquiring I found there was no space on my intended train and the price of the ticket on which the space was available was twice the original one.
Changing at Reading? I've done Reading - Castle Cary to ride to Glastonbury several times, and never found them full, but I can see it could happen as there are relatively few trains stopping at Castle Cary. There are alternatives:
1) Go to Basingstoke, change for a through train to Castle Cary via Yeovil Junction (that section requires booking). These only run twice per day at present, and are slower so they will not show up on a planner website set to the default 'fastest route' setting.
2) Go to Basingstoke, change for Yeovil Junction (that section also requires booking) then ride 2 miles from Yeovil Junction to Thornford Bridge station for a train to Castle Cary. This will not show up on rail planner websites because of the ride between stations, but it is possible to get a through ticket. Thornford Bridge is a request station, so if going that way do wave at the driver or the train may pass through without stopping.
P.S. if you like real ales or ciders, you may have already found the Travellers Rest at Stone, a very good stop on the Castle Cary - Glastonbury cycling route.