For good or for ill, Britain is in some respects moving away from a prime-ministerial system towards a presidential one. This is emphatically not, as is sometimes argued, simply a function of Tony Blair's personal ambition. The shift towards a more presidential style was already visible under Margaret Thatcher.

High-level political wives are by no means new. In the 18th and 19th centuries, when patricians dominated British political life, it was common for politicians' spouses to play an active political role.

Irrespective of their party affiliation or wishes on the matter, those governing from 10 Downing Street now have to take on much of the aura and role of head of state. And this is bound to have heavy consequences for their family.

Linda Colley Quotes