Paul, as with all remote diagnostics its difficult here goes
1 Whats changed ? since the car was running any adjustments/alterations /mods. Start here 1st
2. Obvious plug problems - dirty age
3. Cb points closed pitted dirty grease across surfaces
4. Coil LT lead split- HT lead cracked - and best of all the distributer cap cracked tracking
I would favour checking for spark/volytage at the points, if no good look this evening for evidence of electrical tracking on dssy cap -also check the centre graphite component is still there - it presssses onto the c rotor arm.
Good Luck
steve