This is an extremely astute observation.
We touched on this topic in the Libby discussions, but it is a safe bet under UK procedure he has said some things. Most likely in a written statement.
Just as a hypothetical example, let's say your car is tracked by CCTV cameras in a way that could harm your defence, but actually you were driving to the local McDonalds. You could elect to simply say nothing to explain that pre-trial. But under UK law reform about pre-trial statements, your reasons for being in the area might qualify as something that should have been reasonably disclosed.
So unlike the US, there are significant tactical reasons under UK procedure that might compel the accused to volunteer his movements pre-trial.
Failure to do so could lead to adverse comment from the judge.
The reason is that otherwise you can listen to the entire prosecution case, then announce you were going to McDonalds, but because it is months later, the Crown had no chance to check drive-thru CCTV etc
This is very common with alibi defences.
So I would guess you are correct. There is a good chance the accused has offered an account of his movements, such that he can rely upon that version at trial.
IIRC
@Angleterre has significant expertise on this topic having conducted numerous pre-trial interviews.
02c, disclaimers etc