Unreceipted expense claim

Client has provided their P11d info and accounts to June 11 in one go (yes I know P11ds are late).

The expense claim (he is Ltd Co contractor) details each day mileage x to Y, other sundry items eg train etc but every day he is on site he has claimed £2.20 coffee and £6.00 subsistence. The daily claim merely says "Subsistence (un-receipted)" - it adds up to some £1500.

I am quite sure he oes buy a costa/starbuck every day and lunch, I have no issue with that but he same every day - not even any allowance for more/less on hungry/non-hungry days!!

Now I know he will say, "my last accountant let me do it and never mentioned I was doing anything wrong", but I am of a mind to go back and tell him that he can't do the round sum claim without proof. Or at least he can but he will get taxed on it.

Before I shove my size 12s in my mouth do any of you have any ideas as to a practical resolution.