British and US counter-narcotics official argue, though, that there was never any chance of a quick replacement for opium.

BBC: A farmer extracting opium from a poppy blossom

McAllister's second successful penalty reduced Munster's lead to 19-9 and Sale seemed to be back in it on 51 minutes when Hodgson scored in the corner after a quick tap from replacement scrum-half Dwayne Peel.

BBC: Munster 37-14 Sale

Brown did add a consolation try after Quins caught the Blues napping with a quick penalty tap, although replacement kicker Adrian Jarvis's conversion went wide.

BBC: Blues 23-12 Harlequins

But Clegg, who was appointed by owner Marcus Evans this week and is the former chief executive of the British Olympic Association, refused to rule out a quick decision over a permanent replacement.

BBC: Magilton sacked as Ipswich boss

As the clock ticked down, the Warriors began to kick long to gain quick ground and Parks rediscovered his touch by adding another penalty before his replacement, Ruaridh Jackson, scored another.

BBC: Glasgow 25-20 Edinburgh

Francisco Sandaza, a replacement for David Robertson, volleyed over as United looked for a quick reply.

BBC: Dundee United 0-3 Rangers

Despite relying on the likes of Patrik Berger and Pavel Nedved to implement his policy of attack, he was quick to overlook Berger in the warm-up games when he knew a replacement would be needed for the Liverpool midfielder who is suspended for the first two games.

BBC: Jozef Chovanec

Disruptions and revolutions are quick and often violent, but I wonder if structurally what happens in these situations is the spontaneous replacement of an old central structure (the shaft) with a new exoskeleton (the housing of the engine itself) that can contain an energetic process of a higher order than the old structure could metabolize.

FORBES: For Radical Innovation, Nature Loves A Vacuum

But from the next line-out Ireland scrum-half Peter Stringer took a quick tap off the top and scampered through the Scottish defence before offloading to Heaslip, a first-half replacement for number eight Denis Leamy, to crash over.

BBC: Scotland 15-22 Ireland