John Selwyn Gummer, now Baron Deben, was Conservative MP for Suffolk Coastal until 2010.
He was an MP from 1970-74 and 1979-2010 and was Environment Secretary from 1993-97.
He announced his intention to stand down in order to participate in a new pan-European campaign in support of action in response to climate change.
He lives near Debenham, Suffolk, and has two sons and two daughters, His son Ben is MP for Ipswich.
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