I might be wrong but I thought that Maudslay only related to the RegentIII/Merryweather appliances as those chassis were built (or maybe modified from the bus chassis) at the (formerly) Maudslay works. I have always thought of the Mercury chassis as AEC products.
something I hope clears up the is it an aec or is it a maudsley thing , up until 1960 or just after maudsley were still building chassis and thereafter were fully integrated into aec and all products were built by aec after that time scale , this aec style grill was used by merryweather on maudsley chassis just to make things seem otherwise
Added by Kyle on 21 November 2014.