Britons not convinced Afghan war can be won - Stirrup

LONDON (Reuters) - Britons are not convinced the war in Afghanistan can be won, Britain's chief of defence staff said on Sunday, as two new polls showed support for the war was dwindling.

"People remain to be convinced about whether or not this is doable," Jock Stirrup, told the BBC.

His comments came as the defence ministry announced the 231st British military death since fighting began in 2001, the eighth in the last week.

"We have not done a sufficiently good job in answering three basic questions," he said.

"Is it important enough to us as a country, to our security, to justify the price that our people are paying? ... is it physically doable? ... and are we doing it properly?"

Two polls published on Remembrance Sunday showed public support for the war has fallen, a blow to Prime Minister Gordon Brown who has this week sought to bolster backing at home to keep British troops in Afghanistan.

Continuing loss of British lives in Afghanistan could damage Brown's Labour Party in an election he must call by next June and which the Conservatives are favourites to win.

A ComRes poll for the BBC found 64 percent of Britons now believe the war is "unwinnable," up from 58 percent in July, while two-fifths of people said they did not know why British forces were in Afghanistan.

More than half agreed that corruption in Afghanistan's government meant the war was "not worth fighting for."