Rolls-Royce 20hp in the workshop

I've known this car, and its owner of course, for a few years now, and it's 8 years since I rebuilt the engine - how time flies. It's going on a road trip so I'm giving it an oil change and checking valve, points and plug gaps - which were all spot on, and sorting out anything else I can find. The v-belt was a bit loose, a new one is on it's way, and the Lucas 33117 flasher unit is causing issues so I'm going to replace that too.