In message , "Dave Plowman (News)"
writes

You need to check how much current is being drawn from the battery with
everything off. On a basic Morris Minor, probably zero is correct. But on
most modern cars something like 40mA or so is normal.

No radio fitted and yes, the current draw should be zero with everything
off. Car untouched since a 20+ mile run on Tuesday afternoon, when I
disconnected the interior light, so I'll try the starter later this
morning. With a little luck, battery will still be fully charged,
having convinced myself that current is leaking through one (or both) of
the courtesy light switches.
--
Graeme