You can disallow any costs that are dis-allowable. Firstly I suggest you should raise an early warning about their unhealthy lifestyle (coffee and burger king). On a more serious point - I would ask them where in the SCC does it suggest that these costs are payable? Once thy have told you where they think they are entitled to claim it then you can make a judgement on that point.
At the end of the day, if it is at the very least questionable as to whether something is allowed or not, you ask the client here have more control than them. If you disallow these costs - how likely are they to go to adjudication on this matter?
At the end of the day, if it is at the very least questionable as to whether something is allowed or not, you ask the client here have more control than them. If you disallow these costs - how likely are they to go to adjudication on this matter?