http://www.legislation.gov.uk/uksi/2017/98/madeThe Air Navigation (Restriction of Flying) (Bolesworth Castle) Regulations 2017King's Printer of Acts of Parliament2017-02-06 The Air Navigation (Restriction of Flying) (Bolesworth Castle) Regulations 2017RegulationsThe Air Navigation (Restriction of Flying) (Bolesworth Castle) (No. 2) Regulations 2017reg. 4reg. 1