However, if it is strongly suspected that there will be disruption, should at least some extra buses be booked above the normal standby requirement?
There are two parts of the ORR, that bit that oversees safety, and the bit that deals with funding. I don’t see any help coming from the bit that deals with funding.
We still haven't got to the bottom of how, why and when the buses just 'disappeared'. With no rail staff available to supervise or monitor them at Yeovil Junction nobody in authority was there to notice them disappear (or deploy any extra standby buses).
The ORR is only involved in
Network Rail funding, not TOCs (SWR in this case). Funding allocated to Network Rail's structures (in the face of climate change) has been progressively increased, as was widely noted after the Carmont incident, so I'm not sure what more can be expected in relation to the flooding on this route.
In any event ORR doesn't actually
provide any funding. The funding envelope is set by the Secretary of state for Transport in the Statement Of Funds Available. I know that Chris Grayling doesn't always get a lot of gratitude on these forums but he actually said, "At this stage we expect around £47.9 billion to be spent on the railway across control period 6." (on 12 October 2017). This was a record level and a real terms increase, I understand. The ORR's role is to make sure as far as it can that Network Rail has a coherent plan to deliver its obligations and spend their money wisely and efficiently.
It seems to me that there has been quite a bit of "help" to Network Rail.