My company sources and imports products for a client company. From a VAT/Tax perspective,am I selling products or providing a service?

For example:
I source the £10,000 worth of products for Company 'A' directly from the factory. Company 'A' pays me £10,000, I pay the factory and arrange the products to be delivered to Company 'A'.
I make my money by charging the company 2% more for the items than the factory prices them at.
Should I be charging the company VAT and Tax on the items ? or am I just providing a service?