Alex Allan, the government's e-envoy, is to leave his post for family reasons, it was announced today.

Mr Allan, who runs a unit within the cabinet office to promote Britain's e-commerce credentials, will step down at the beginning of October.

A cabinet office statement said the envoy's reasons for leaving were "purely personal". It added that Mr Allan's wife has been ill and that he wished to spend time with her in Australia.

Mr Allan said he was sorry to be standing down. "I have found the job hugely stimulating and it has not been an easy decision."

He continued: "I am sure my team and my successor will carry the government's programme forward with vigour, backed by the clear commitment shown at all levels of government."