Thanks, had a quick check as I never thought of Reading. Quicker Redhill to Reading then on to Bournemouth.
Not sure if my ticket is transferable but I'll give it a go.
Looks like being a bit of an ordeal. Living near Croydon (yes I know) have booked a train from Clapham Junction, however since booking South West Trains are now no longer running, RMT are striking.
Any suggestions for an alternative route? I'm sure I read on here that the coastal route...