Could not book a slot within 3 days. Have now cancelled my membership. After many years of being a member i now realise what a scam the NT is. Stately homes (sometimes still partly occupied by the original owner) propped up by membership with umpteen restrictions. Also stately homes built and maintained on the backs of the poor,and sometimes built from money gained by crooked aristocrats or human misery. I'll stick to the local park.