Viewers have complained about a foul-mouthed exchange between Ant and Dec on I’m A Celebrity… Get Me Out Of Here! – at a time when TV bosses have ordered a crackdown on swearing on the box.

The usually squeaky-clean presenters turned the air blue on Monday night by repeatedly using the word ‘b******s’, triggered by the Bushtucker Trial in which Nicola McLean was shown eating a kangaroo testicle.

TV watchdog Ofcom confirmed to the Daily Mirror: “We have received complaints about the programme broadcast on Monday. These are being assessed against out Broadcasting Code.”

The offensive sequence came when Ant described the Bushtucker Trial as ‘the dog’s b******s’. Dec chipped in to joke: “No, it’s the kangaroo’s b******s!” Ant then repeated the offensive word by adding: “and the crocodile’s b******s and his penis as well.”

With the pair’s exchange coming just 28 minutes after the 9pm watershed, it’s likely to anger ITV’s executive chairman Michael Grade, who recently called for swearing on TV to ‘editorially justified and in context’.

But Ant and Dec’s immediate boss, ITV director of channels Peter Fincham, defended them saying: “I was watching it and I was not offended. With these things, it is about context and context is everything. I that that was in context.”

Mr Grade called for a crackdown on swearing after the watershed saying the use of offensive words had become ‘indiscriminate’.