The engine had been getting difficult to start, turning over for ages before firing, despite a full 30 seconds on the pre-amp setting. Lots of white smoke emitted until it did eventually start running and settle down.
Arranged for Nantwich Canal Centre's engineer to come and have a look. Initial telephone discussion did suggest that one or both glow plugs were either not working or carboned up.
Turned out that both glow plugs were dead... Unfortunately, because the plugs fit to the engine with an adapter, they are a different type which needed to be procured overnight.
They duly arrived and were fitted. Note: the plug needs to be fitted to the adapter first and then the adapter to the engine...
Once in place and after just 20 seconds pre-warm, the engine started immediately with no white smoke. Amazing difference!
Sets us up nicely for trips out over the summer!