"27. Meaning of 'wages' etc. (1) In this Part 'wages', in relation to a worker, means any sums payable to the worker in connection with his employment, including – (a) any fee, bonus, commission, holiday pay or other emolument referable to his employment, whether payable under his contract or otherwise, … but excluding any payments within subsection (2). (2) Those payments are – (a) any payment by way of an advance under an agreement for a loan or by way of an advance of wages (but without prejudice to the application of section 13 to any deduction made from the worker's wages in respect of any such advance), (b) any payment in respect of expenses incurred by the worker in carrying out his employment, …"
"The question which falls to be decided is whether the lump sum allowance is different in kind from the mileage allowance and is arguably wages, whereas the mileage allowance is expenses, despite the decision in the case of London Borough of Southwark v O'Brien[1996] IRLR 420 in which the position was arguably different because the employee in O'Brien was only in receipt of a mileage allowance."