Lorry purchase and ongoing costs

My son is a sole-trader and purchased a horse lorry in the last tax year. He used £8500 of his own savings and had a loan of £10,000 from me which he is paying back. I'm pretty confident that all of his costs and fuel can be included in his expenses but how is the initial purchase and the loan shown on his tax return plus can he also depreciate the vehicle value over x years.

Hi paul scott,

The  horse lorry can be considered plant and machinery.  
Capital allowances can be claimed against the vehicle.  
Your son may have the choice of claiming annual investment allowance (AIA) or claim writing down allowance instead.
Claim capital allowances  
This is in relation to the asset itself    
In addition, he could claim expenses for the vehicle.  
Have a look at
Expenses if you're self-employed

Thank you.

Brilliant, thank you