In reply to Removed UserGarry Young:
Access land is shown as Lankyman describes on a 1:25k OS map, but not a 1:50k. If you don't happen to have a copy you can get a look at it online via Bing.
https://www.bing.com/maps?osid=25dbd712-c3f8-42f1-96c5-758e90c155b3&cp=...
It isn't on access land, but that doesn't necessarily mean you can't go there. Especially if you can get there from a public footpath without crossing any fences or trampling any crops. It's usually a good idea to be discreet, and very careful about how/where you park if you drive there.
The BMC RAD (Regional Access Database) can be a good place to check the access situation for a crag that you're not sure of. (But I just had a quick look and apparently it has no entry for Guy's Rift.)
It's also on the database here: Guy's Rift, aka Cloud Quar...
I see that deepstar is the crag moderator. (A volunteer who checks new information and updates the database as required.) So perhaps there's some back story he's not telling us to explain his somewhat suspicious and hostile reply to you above, concerns about access, the place being abused in some way or something like that maybe.