Oh the horror, a ten minute walk!
Edit: Okay, that might be insensitive if you are of limited mobility - get a taxi and try to claim the cost back from Virgin (delay repay would more than cover it if you take it as cash).
Must admit this is a general problem with acceptance. Often it is announced that you can, say, instead of the WCML at MKC use Chiltern from Aylesbury if there is severe disruption - but then acceptance is withdrawn before home-time. Then one's car is stuck!
In my view if acceptance is offered it should be available for the return journey of everyone who took it up on the outward, certainly on the same day.
Could hire some in from the railtour operators, perhaps? That said, I think (being on it today) what they are doing is largely working. That said I did get sick of the long queue for Edinburgh buses at Carlisle (I think they underestimated it a bit, though they have signed it well) and instead am now on the ScotRail stopping service on the GLSW, the Voyager having gone before I changed my mind
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A question on this, by the way - is Delay Repay applicable (presumably based on use of the bus, which I think would mean either 30mins or an hour), as I bought my ticket before the disruption?