Surprising, given the amount of redundancy in SWR» 's network that they seem to have sent nothing at all that night right at Clapham Junction, then left at Virginia Water to pick the Main Line back up at Byfleet.
The Down Lines reopened after about an hour, so I guess little would be saved by rerouting trains in that direction. A few Up trains were sent from Woking via Chertsey, and the Up lines reopened after about two hours. Recovery of Up services took some time after that; I think only one track was in use.