I don't know if this is the correct section, but if it isn't, could someone please move it (or even bin it !)
Part of the "when we had a manufacturing industry" theme.
I've often seen these from the toll booths, so one day, I diverted, asked if I could have a look around, and so (amazingly with permission !) I did.
SMMS (Stone Manganese Marine Shipcare) of Birkenhead, design ships propellers, they used to make them, here in the UK, but no longer. However, they still have one or two left in Birkenhead, should the MOD need any. SMMS Website
I pass them most days, coming out of the tunnel, after paying £1.40 for the Merseytravel Automotive Urbex opportunity.
You don't often get as close as this: