If it's the front wheel bearings, you can fairly easily take up the slack in them, there is a tutorial on here. I did mine 2 years ago, and they have been fine ever since.
MoT pass always a relief that no money need be spent !
Pleased it passed, took the Merc last week and it passed - always a bit of a relief even though it is well maintained so I know the feeling that a new MoT gives you.
Mind you it had only done a couple of hundred miles since last year.