[oldnick]

thanks ray , sounds like a plan , didn't know that existed
when I have the battery fully charged again will pull the radio , disconnect the live feed , leave the main fuse in and double check that this cures the drain [ have already done that with the CD stack to no effect ]
if that works will get one of those gizmos
if I read the spec correctly one needs just a flash of electricity to start up [ a bit like a bell push rather than an on/off switch ] ; got a spare slot in the row of switches on the dash ....is there a matching switch for something else that could be used ?

incidentally , rear seat entertainment ? have forgotten such days !