It seems to conform to all the criteria for EH to schedule it under their statutory duty http://www.english-heritage.org.uk/server/show/nav.00100200400d004
but so what?! I'm not sure it's even worth asking them.

Beware a heritage director saying "It’s beyond our wildest expectations.... and it’s so good for Basildon" as it means he knows it's a gonner and a flood plain and waste disposal plant is even better - and the peasantry will have the benefit of a few artefacts in a museum elsewhere and the obligatory "wildlife habitat" (which involves practically zero expense but sounds cuddly). Similar things were said about Thornborough and Rotherwas, especially how lucky everyone was!