Business Mileage

Hi,

Client of mine is a doctor who currently is employed by numerous organisations as a locum doctor.

My question relates to whether he is allowed to claim any business mileage via the employment section of his tax return travelling from one "temporary" employment to another. He claims that as the employments are of a "temporary" nature that he is allowed to claim the mileage but I am not convinced.

Can anyone help out?

Thanks

Matt