Thanks for the help gents - Ken has kindly sold me a heater panel - I doubt my shaky hands can cope with that how to

Took the lower dash apart earlier, and will sort the power socket bulb later
Also took the opportunity whilst the dash was in bits to put in a new heater blower as well, so some more progress in getting it back to tip top condition - the old one was noisy as hell with worn bearing

Some pics of my toy
here