BS476 Part 7 Class 1 is the FR / Fire Retardancy test for contract wall covering.
In the case of fabric wall coverings, the fabric is held vertically and subjected to a flame. If the rate of spread of any flame falls below a certain level the test is passed.
The test is a severe one. It is appropriate for example, in hotels and offices.
When organising treatment for your fabric ask for it to be treated so that it passes this standard test and inform the treatment company that the fabric will be subsequently tested.