One difference between Margaret Thatcher and Gordon Brown is that famously Margaret Thatcher did not believe in U-turns.

BBC: NEWS | UK | UK Politics | David Davis speech in full

It might not be a feud to rival Heath vs Thatcher or Blair vs Brown but the row between Conservative MPs Nadine Dorries and Louise Mensch is in the tradition of great Westminster spats.

BBC: Dorries vs Mensch: Conservative MPs in Twitter spat

But a Policy Exchange poll suggested that people in the north hold Margaret Thatcher in higher esteem as a PM than Gordon Brown.

BBC: New report highlights north-south divide among voters