Ramshaw is home to some of the hardest routes in Britain and most of them are graded HVS - a Yosemite style tape job is the only access requirement! There are no access problems at the main crag. However, do not try and climb at Lady Rock (the buttresses on the far right above the farm house), these are not on access land, the owner lives very close and has been confrontational.
Open access land, designated under the Countryside & Rights of Way Act (2000) give area access rather than linear access as provided by public rights of way. It also gives a legal right of access specifically for climbing, as well as walking and other quiet recreation on foot.
Please bear in mind however that the landowner still has the right to restrict access for up to 28 days per year (often used on public safety grounds for shooting in moorland areas), and can also apply for longer term restrictions with Natural England (such as bans on dogs, or regular restrictions during particular times of year). It is important to check for these restrictions regularly as they can be added at short notice – all details for open access land in England can be found on Natural England’s website.
The furthest right buttresses including Lady Rock are not on CRoW land unfortunately.
Groups may use this crag, but please do not abseil and in particular not down Louie Groove. All group leaders should familiarise themselves with BMC guidelines for group use, see here, http://www.thebmc.co.uk/Download.aspx?id=350