Any airfield that doesn't request "PPR by phone" I don't bother calling before and just turn up and ask to land. That way if we decide to go elsewhere, no big deal. There are lots of airfields around that don't require PPR by phone (Examples: Old Sarum, Compton Abbas, Dunkerswell, Bembridge, Shoreham etc....) and if you do phone them they just say...rightyo see ya later.
It has onluy caught me out once, on a flight to Bembridge a few weeks ago and we'd missed the Notam of being closed
Never mind, we just went elsewhere. Might be worthwhile if you are travelling a long distance, beyond bladder diverting range at any rate !