The UK's trading watchdog has launched a "wide-ranging" investigation into doorstep selling, following a complaint from a leading consumer group.

The Office of Fair Trading (OFT) formally announced the report following a "super-complaint" from the National Association of Citizens Advice Bureaux (Nacab).

Under The Enterprise Act, a number of bodies, such as Nacab and the Consumers' Association can refer fast-track complaints to the OFT.

In a statement, the OFT said it would launch a thorough investigation into doorstep selling, and also the issue of credit.

The announcement was welcomed by David Harker, chief executive of Nacab.

He said: "We are delighted that the OFT has recognised the need for an investigation of doorstep selling based on the strength of the evidence we presented to them in September when we lodged our super-complaint."

The OFT said its report would be completed within a year.