knife-edge

South Africa centre Andre Esterhuizen says that a successful blitz lives on a knife-edge – flipping from ferocious front-foot aggression to desperate corner-flagging cover in the blink of an eye.

It’s an approach that maintains and worsens the daily reality on the knife-edge of nuclear war.

A decision by the Bank of England to cut interest rates later is "on a knife-edge", according to analysts.

Analysts believe the choice of whether to cut the benchmark rate stands on a knife-edge, although a cut at some point this year is widely expected.

In his own constituency, Mr Hunt has admitted he faces a "knife-edge" battle with the Liberal Democrats to win the new seat of Godalming and Ash in Surrey.