According to staff at Guildford this morning this was due to cable theft between the two tunnels on the Shalford side of the station.
They were laying on Taxi's for passengers travelling onward via the Portsmouth and on the north downs lines. Our Taxi from Guildford to Reigate cost abou ^40 so multiply that (and fairs to Gatwick etc) so someone somewhere is going to have to pick up a big bill!
It took a while to get the taxi queue system organised (during which there were some fracious exchanges) but T got to see different scenery than I would have otherwise done