http://www.legislation.gov.uk/uksi/2012/83/madeThe Air Navigation (Restriction of Flying) (Southend-on-Sea) Regulations 2012King's Printer of Acts of Parliament2012-01-18 The Air Navigation (Restriction of Flying) (Southend-on-Sea) Regulations 2012reg. 3(1)The Air Navigation (Restriction of Flying) (Southend-on-Sea) (Amendment) Regulations 2012reg. 3reg. 1