THE BBC has held an ­internal investigation into Top Gear after a string of controversies involving the hit motoring show.

A report on its culture and practices has been sent to director of television Danny Cohen and people working on the show were asked if they thought it was racist.

Top Gear was found to have breached Ofcom's broadcasting rules last month over a "racial" term used by presenter Jeremy Clarkson. The regulator decided the comment, made during the programme's Burma special screened in March, was offensive.

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That came three months after Clarkson was caught up in another racism row which forced him to apologise and be given a final warning by the BBC.

In that incident, unaired footage from the programme came to light in which he appeared to use the n-word.

It is not the first time Clarkson has talked himself into trouble. He was criticised by mental health charities after he branded people who throw themselves under trains as "selfish" and forced to apologise for telling BBC1's The One Show that striking workers should be shot.

An episode of the show filmed in India was criticised by Indian diplomats and the BBC had to apologise to the Mexican ambassador after remarks made by Clarkson and co-hosts James May and Richard Hammond.