That left the economy as the one remaining area of hope for change.

ECONOMIST: Vladimir Putin takes on democracy, the West and all-comers

But the new antibodies target an area of one protein that does not change.

BBC: Antibodies 'may aid HIV jab hunt'

Eco-towns, intended to tackle the twin problems of housing shortages and climate change, have to be carbon zero as a whole, be an "exemplar" in one area of environmental development and have at least 30% affordable housing.

BBC: Assessment over eco-town project