Its bad news then I am afraid.
If you look at the national rail conditions of carriage, it makes no warranty express or implied as to the punctuality of their trains.
Further their terms exclude any claim for such consequential loss as a result of late running.
If the operator runs a delay repay scheme then you can get the cost of the ticket back.
I am sorry if this is not the answer you are looking for and certainly not the one I want to give you, but I have a duty to be honest.
Can I clarify anything for you about this today please?