ordered the construction of permanent barriers. They now serve as road links, carrying the A961. Work began in May 1940 and the barriers were completed in September 1944, but were not officially opened until 12 May 1945, four days after the end of World War II in Europe.

Climate

The climate is remarkably temperate and steady for such a northerly latitude. The average temperature for the year is 8 °C, for winter 4 °C and for summer 12 °C.

The average annual rainfall varies from 850 to 940 mm. Fogs occur during summer

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