He isn't traditional left wing. I assume he's a Green Party supporter, as most of his articles are on environmental issues. To prevent environmental damage, regulation of industry is often necessary.

Support for nationalization is nowadays limited to natural monopolies, and opinion polls show it's quite popular.

EU support isn't traditionally left wing either: historically, the left wing of the Labour Party (e.g. Tony Benn, Michael Foot, Peter Shore, Barbara Castle) all opposed membership. It was a Tory government which took us in, and Margaret Thatcher campaigned for our continued membership.