Quick update. The second "clipfix" failed and compost would not transfer from the upper to the lower chamber. I’ve just received my 3rd ‘fix’ from NatureMill and will fit is soonest. Update to follow so Fingers crossed.
This week I visited a ‘Sustainability’ show at the NEC Birmingham and came across a stand dealing in ‘starter’ bacteria, usually for septic tanks. I picked up a sample pack and will add a pinch when I restart the NatureMill. The company was confident it would make a big difference to the composting process.