Ms Mayhew complained to the police last year about alleged harassment from Euro-sceptics opposed to her public stance on the issue.
BBC: City leader joins Livingstone's cabinet
2.
For euro-sceptics, including those in the Conservative part of the UK's coalition government, it's an outcome with which they'd be more than happy.
BBC: Britain pushes hard choices for Europe's hard core
3.
The crisis has delighted the Euro-sceptics in Britain and if the currency continues to fall it will strengthen their hand, while undermining Tony Blair's plans to join the euro club immediately after the next election.