Oops.

This is probably because Test Centre Publications ceased trading at the end of 2018 and the link which brought you here is no longer available.

Test Centre continues as TEST CENTRE BOOKS, a bookdealing company which specialises primarily in the British Poetry Revival; the Mimeograph Revolution; underground fiction and poetry; lowlife and underworld fact and fiction; and aspects of film and modern art. 

Test Centre stock is still available and can be found at Prototype.