The 10th would be fine, you might need to change the ticket to use on the 11th. Check the above website in a few days.
To clarify, if the OP's train is cancelled or a delay of more than an hour is otherwise anticipated, they would be entitled to have their ticket rebooked to a later date of their convenience,
without paying anything extra.
Therefore, if the 11th is not one of the dates on which general ticket acceptance is announced, and the OP would have to pay an excess/admin fee to change their ticket in the normal way, they would be entitled to exercise the above right in order to undertake the change for free.