It is not normally necessary to test new items of electrical equipment, because the manufacturer has already tested it, but they should be inspected to make sure there is no damage and that it meets British Safety Standards (as it may have been built incorrectly, abroad) before first use.
New electrical equipment built within the EU and labelled with the CE mark can be deemed safe to use.
Equipment of unknown origins or dubious provenance, such as something purchased online from an unknown shop, may not have the same safeguards in place and may require further inspecting by a professional company, and electrical testing.
If you are sure they came from a reputable supplier than they shouldn’t need PAT testing. New equipment should be safe when manufactured, and are tested before leaving the factory, so there should be no need for you to have to PAT test them before using them. Our page on whether new electrical goods need testing before use gives more information on this subject.