the http://www.goodgaragescheme.co.uk/ is not worth anything IMHO. After working for a motor factors delivery items its amazing how one garage can do something properly and another bodge it while both being "good" garages.
IE one of the GGS charged for a full cambelt kit ~£75 but only took a belt ~£30, apparently they do it a lot!
IE one of the GGS charged for a full cambelt kit ~£75 but only took a belt ~£30, apparently they do it a lot!