For a 7.5 T, your use would need a standard national operators license as you are moving other people’s goods.
To get one you need to show £7200 available at all times to cover vehicle costs, have a CPC qualified transport manager who takes responsibility for making sure your compliant, and a service/inspection contract for inspections between 4 and 13 weeks apart depending on your mileage and use type.
There is also a £560 (ish) application fee which if successful lasts for 5 years.
You must have placed a specific advert in a local paper in the planning section to advertise your planned operating centre, giving people the chance to object. This can be around £200.
Of course your operating centre must be level, safe and in a suitable location for your type of use and frequency of vehicle movement.
You must remember that running a ‘truck’ is considered a large responsibility composited to a van, and you will be expected to run your operation as such, by having suitable procedures in place for defect reporting, inspections, daily checks, drivers compliance with the WTD and drivers hours rules etc.
The official guidance for operators licensing can be found here:
gov.uk/government/uploads/s … _Guide.pdf
A copy of the application form can be found here:
gov.uk/government/uploads/s … 4/GV79.pdf
And all other related documents here:
gov.uk/being-a-goods-vehicl … -a-licence
For details on service requirements read this:
gov.uk/government/uploads/s … V_1110.pdf