A bit more progress.

The new battery was delivered so I fitted it at the soonest opportunity.

I had to flip the battery clamp 180 degrees to make it fit.

The next thing I needed to do to get the engine running again is to set the static ignition timing. The first thing to do is to get cylinder 1 at TDC on the firing stroke. I had to take the camshaft cover off to make sure that the camshaft was in the right position with both valves closed. With the camshaft cover removed, I decided to clean, paint and lacquer it while it was off the engine.

I've also put the charger on the battery to keep it topped up.