Hundreds of fans walked out of a family-friendly festival after multi-millionaire singer and charity founder Bob Geldof launched a shocking foul-mouthed rant at them for wearing Primark clothes.

The 64-year-old had been booked to headline the two-day Brentwood Festival in Essex with his band, The Boomtown Rats, but was booed by revellers after launching the expletive-laden tirade.

He began shouting and swearing as soon as he took to the stage at the weekend and paused his performance after just one song, bemoaning the family event for being 'boring and tame'.

He shouted at waiting fans: 'We don't do Abba. We don't do Robbie f****** Williams. Brentwood, we are the Boomtown Rats.

Bob Geldof had been booked to headline Brentwood Festival in Essex with his band, The Boomtown Rats, but was booed by revellers after launching the foul-mouthed rant. He is pictured above on stage at the event

The 64-year-old had been booked to headline the two-day Brentwood Festival in Essex with his band, The Boomtown Rats, but began shouting and swearing as soon as he took to the stage over the weekend (pictured)

'We are mega. And you are Brentwood. How do we know that you are Brentwood and we are mega?

'Because I am wearing a f*** off pretend snakeskin suit and [they] are wearing f*** off cowboy shirts even though they live in London.'

Referring to one member of his band, he said: 'This [guy] who you'll remember as a slim handsome young lad is wearing a f*** off purple suit with an elasticated waistband so that when he gets even f****** fatter you won't notice.'

The Band Aid founder, who was wearing a £350 snakeskin suit he had personally made by a tailor on London's Brick Lane, then insulted his fans by accusing them of not dressing edgy enough for a music festival and accusing them of wearing Primark clothes.

'On the other hand Brentwood, you are wearing wall to wall f*****g Primark,' he ranted.

'This is a rock and roll festival. When you come to a rock and roll festival you dress for a rock and roll festival. You can never be too careful.

'That song we just did was written at the end of 1975 when Margaret Thatcher became leader of the opposition.'

Fans began to boo the singer-songwriter, but he responded: 'What are you booing for? We're in f****** Brexit land here guys. Yeah, we're Irish, we're still in Europe.' He later stopped after one song to continue the rant

The Boomtown Rats frontman stopped after one song and insulted the family event for being so tame

Fans began to boo and hiss the singer-songwriter, but he responded: 'What are you booing for? We're in f****** Brexit land here guys. Yeah, we're Irish, we're still in Europe.

'It's just as well we wrote that song because this year is about Theresa May. She's gonna do you in.

'There's always someone looking at you Brentwood.'

Disgruntled fans quickly took to Twitter to vent their frustration at the super-rich singer's outburst.

Lydz Oldershaw said: 'Bob Geldof swearing and going mental at Brentwood festival was so inappropriate *telling the crowd off for wearing Primark*.'

Another Twitter user, writing under the handle @ballsandbeers, said: 'Horrendous individual, who loves the sound of his own voice. He hasn't made a decent track in decades.'

During a performance of I Don't Like Mondays, Geldof paused and stayed silent for 90 seconds.

One festival-goer, who left with her husband before the finale, said: 'They sounded pretty dreadful, especially after just hearing the fantastic voice of Tony Hadley, and of course they have a very limited back catalogue.

'We were just thinking we probably wouldn't bother staying to hear I Don't Like Mondays as it didn't look like it would be worth the wait when Bob launched into an extraordinary, expletive-laden rant.

'As he launched into another dreadful song, we, along with hoards of others, headed for the exit and I found myself in a queue to leave in the middle of the headline set.

Bob Geldof was criticised by fans after he began shouting and swearing as soon as he took to the stage at the weekend. He stopped performing after just one song, bemoaning the family event for being 'boring and tame'

Fans were seen leaving the family-friendly event after Geldof began offending fans with a foul-mouthed rant

Festival-goers could be seen packing up their belongings and leaving the event before it finished due to Geldof's outburst. Many later took to Twitter to complain about the 'unnecessary' swearing and lengthy rant

'All around you could hear mutterings from fed up festival-goers of how disgusting he was and 'how dare he'.

'It was a shame he had marred what was otherwise a fabulous day out.'

Festival co-ordinator Laurie Edmonds apologised for the language, but said it was 'part of the act.'

She said: 'They're a punk band. You expect them to be a bit controversial and he got a reaction from the crowd.

'People know he speaks his mind. That's just what they do but they were a fantastic punk band and we thought it would go down well with our crowds.

'We know he's a bit of a lightning rod and people will have strong reactions to him.'

The Band Aid founder insulted his fans by accusing them of not dressing edgy enough for a music festival and accusing them of wearing Primark clothes. He is pictured with his band, The Boomtown Rats, after the event

Disgruntled festival fans quickly took to Twitter to vent their frustration at the super-rich singer's outburst

She explained that organisers had made a conscious decision to put the act on post-watershed.

She continued: 'We were disappointed that there was so much swearing. We want this to be a family event and it would have been nice if it was toned down.

'Some people who felt it was offensive made the decision to leave.

'We're truly sorry if people were offended. It wasn't our intention in booking them.

'We have had a couple of complaints but we've equally had people saying they were one of the best sets all weekend.

'There were still several thousands of people who stayed to the very end and were asking for encores.'

Geldof wore a £350 snakeskin suit at the event that he commissioned to be personally made by a tailor on London's Brick Lane (left). He is pictured right at an anti-Brexit protest outside Parliament earlier this month