History of Guernsey St Saviour, St Pierre du Bois, Ste. Marie du Catel, and the Vale. The loss of Normandy by King John in 1204 isolated the Channel Islands from mainland Europe. Each time England and France went to war over the coming centuries, trade to and from the Channel Islands was restricted or banned and even when not officially at war, the island was repeatedly attacked by continental pirates and naval forces. Fortifications were improved in the Channel Islands, manned by professional soldiers and the Guernsey militia who would help to defend the Island for the next 600 years. Service was compulsory
Bailiwick of Guernsey government. All three legal jurisdictions need Royal Assent from the Privy Council on its primary legislation. Each jurisdiction raises its own taxation, although in 1949 Alderney transferred its rights to Guernsey. The island of Guernsey has a population of around 63,000 in and forms the legal and administrative centre of the Bailiwick of Guernsey. The parliament of Guernsey and of the nearby inhabited islands of Herm, Jethou and Lihou is the States of Guernsey. With a population of around 1,900 in , Alderney has its own parliament, the States of Alderney, which has ten elected members and an elected president.