Approved Document E stipulates that testing should be completed over a structural floor. Consent should be obtained from buiilding control if testing is to be completed over a soft floor covering such as carpet or foam-backed vinyl. Please see Building Regulations Approved Document E Annex B, section 2.13 for more detail.
Any impact tests performed over floor finishes (such as laminate flooring, tile, vinyl or carpet) will be clearly stated on the test report as a deviation from the standard test method.