A sole trader can use a van as a business asset, but business and private use need to be dealt with correctly for tax and record-keeping purposes.
Keep the business purpose clear
If the vehicle is used for both business and private journeys, records should make that distinction clear. This matters for tax and for understanding the true cost of the vehicle.
Compare ownership and leasing
There is no automatic reason for a sole trader to buy outright. Leasing or finance may suit cash flow better, while ownership may offer more flexibility over mileage and disposal.
Think about insurance use
Make sure the declared use matches the work you actually do. Deliveries, carriage of goods, tools, employees and travel between sites can all change the risk.
Take tax advice where necessary
Allowances and tax treatment depend on current rules and individual circumstances. Check HMRC guidance or ask an accountant before relying on tax savings in the buying decision.