I think you’re possibly confusing depreciation with capital allowances. The first is presented in your accounts and is little more than a vanity figure (although it’ll typically follow a set formula). The second is perhaps more what the tax man is concerned about (
https://en.wikipedia.org/wiki/Capital_allowance and
https://www.gov.uk/topic/business-ta...tal-allowances). Sounds like you should get a new accountant!