Hi, yes it is a bit bouncy! It's Corkeen according to https://planning.lancaster.gov.uk/online-applications/applicationDetails.do?keyVal=S4KOKCIZH2Z00&activeTab=summary

I can't say that it's ever occurred to me to tag the surface material of notice boards! The three existing uses of surface=cork are all playgrounds. Hopefully the primary tag will help data consumers a bit, but a more specific surface tag is also a good idea.