Hi Gabriel Brudniak,
You can claim capital allowances on items that you keep to use in your business - these are known as "plant and machinery" and would include the items you mention.
In most cases you can deduct the full cost of these items from your profits before tax using the annual investment allowance (AIA).
You can only claim AIA in the period you bought the item. If you buy something under a hire purchase contract you can claim for the payments you have not yet made when you start using the item. You cannot claim on the interest payments or charges.
Further guidance on capital allowance can be found at: Claim capital allowances