capital allowance on business vehicle. deprivation value as loss

[jason9874]

Hey everyone!

so I have a chauffeur business and I'm the only employee. my customer intend to be driven in a new plate vehicle. which I'm having to change my car twice a year in March (e.g 17 plate)and September (e.g 67 plate). my question is would the depreciation value difference would count as a loss and would be deducted from profits?

e.g I buy a mercedes s class in March 17 for invoice figure of £59,000 exc vat. in September I change my car and my car would value at £39000 exc vat. would the £20,000 be counted as a loss?

I would request if any one who can help me to understand this make their answers simple as possible. thanks