A Taliban commander has told Sky News that the militants are for the first time plotting to attack Westerners in Britain and the rest of Europe.
In a rare exclusive interview, the commander insisted the militants had stockpiles of weapons and would never give-up exacting revenge from what he called "the foreign invaders".
He confirmed that Taliban fighters are taking refuge within neighbouring Pakistan and are being helped by locals sympathetic to their cause.
Sky's Asia Correspondent Alex Crawford and her cameraman Phil Hooper travelled to the dangerous Pakistani border region for an exclusive report.
The commander, Mullah Mohammed Amin, an official in the Taliban government at the time of the U.S.-led Coalition invasion in 2001, claims to have been a fighter for about 15 years.
He said that the resurgent Taliban was inspired by tactics used by militants in Iraq - and wanted to export terror to the West.
He was speaking as controversy over Britain's involvement in the War on Terror increases.
A total of 41 U.K. troops have been killed since the invasion, many of them since redeploying to the dangerous southern Helmand province in May.
Leaked emails have also appeared to show increasing frustration among some British troops, many of whom are involved in some of the fiercest fighting the U.K. has been involved in for decades.
Referring to British Prime Minister Tony Blair and U.S. President George Bush, Mullah Amin said: "It's acceptable to kill ordinary people in Europe because these are the people who have voted in the Government.
"They came to our home and attacked our women and children.
"The ordinary people of these countries are behind this - so we will not spare them. We will kill them and laugh over them like they are killing us and laughing at us."
He said Taliban fighters were learning from the Iraq insurgency in their use of remote-controlled bombs, landmines and suicide bombers. He said: "They are our best tactic."