Their duets are frenetic and filigreed with extreme physical touches, from plunging leg stretches to precise combination moves.

A precise combination of bank and lift must be generated to cause the required centripetal forces without producing a sideslip.

Much of the comedy stems from precise combinations of flippancy and gravity of tone coming out of both young and old mouths.

He said that for half a century, food technology had refined the production of precise combinations of flavours - largely artificial - that could hook us on particular types of foods.