MOT Bay Dimensions

Hi people.

Wondered if anyone could shed some light.  

Ive been trying to find an updated "requirements for authorisation" document containing the minimum specs/dimensions dvsa set out for a new ATL install.  The newest one i can find is this one www.gov.uk/government/uploads/system/uploads/attachment_data/file/222614/Req_for_Auth_common_classes_1211.pdf   but that doesnt include dimensions. The newest one i can find that does have dimensions is from 2004!!!!   www.transportoffice.gov.uk/crt/repository/CONT088464.pdf    Clearly things have changed since then.

The video from vosa that baz posted on youtube   discusses many of the newer required dimensions, but i cant rely on just those and keep referring to a youtube vid while i make my plans!  Perhaps im just not the worlds best googler?

Many thanks in advance guys!