Allowable taxes. What can he claim?

[Iklboo]

Hope someone can give a quick guideline here:

DH is self employed driving instructor, just putting the finishing touches to his accounts.
What can he claim in Allowable Taxes (apart from fuel, car repairs etc)?
He's been told by one person he can claim up to £5 per day for meals as he has to 'eat on the run' and also for clothing used for work. And then by someone else that he can't.
Any ideas please ladies?

Anyone?

I'd be very surprised if he could claim on either clothing or meals in his line of work. Unless its a uniform?

That's what we thought - he's self-employed so there's no uniform and any clothes he bought would also be for personal use and therefore not an allowable expense. Same with meals - he'd eat anyway during the day if he worked in an office or didn't work at all.
I think we've been a bit misled and will work on premis that they aren't claimable.

Thanks!