Re: Doesn't that mean the crap dish can't be replaced by new gear?
What's crap about it? It's the third largest steerable dish in the world, was resurfaced in 2008 and both the instrumentation and steering hardware are periodically renovated and kept up to date for new projects and observations.
It's also the heart of e-Merlin and significantly improves the resolution of EVN when tied in, being one of the highest latitude dishes in the network.
If anything, UNESCO status would probably help them enforce their radio-quiet area in that corner of Cheshire and smooth the planning process/promote development of new instruments.