British-based men of Afghan origin are spending months at a time in Afghanistan fighting Nato forces before returning to the UK, the Guardian has learned. They also send money to the Taliban.

A Taliban fighter in Dhani-Ghorri in northern Afghanistan last month told the Guardian he lived most of the time in east London, but came to Afghanistan for three months of the year for combat.

“I work as a minicab driver,” said the man, who has the rank of a mid-level Taliban commander. “I make good money there [in the UK], you know. But these people are my friends and my family and it’s my duty to come to fight the jihad with them.”