Lumley Castle and Slaley Hall.
Lumley Castle in Chester-Le-Street, Co Durham has a good helipad though a little confined. Landing fee is £200 which is reduced to £100 if flying into an event. Either way, i've been in a couple of times and you have to walk into the Castle to pay your money etc, no one to greet you or any hospitality.
Slaley Hall, great place, just North of Derwent Reservoir. Been in a good few times, people to greet you when landing and escort you, very friendly etc. No landing fee at all. Definately recommend it!