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Dozens of people attending an upmarket music festival were struck down by severe stomach upsets after an outbreak of food poisoning suspected to be linked to a stall selling Yorkshire puddings.

Environmental health officials were alerted by the festival organisers and immediately launched an investigation after they were tipped off about a spike in cases at last weekend's Truck Festival, where tickets cost up to £320.

Almost 30,000 people attended the sold-out four-day indie music bash at Hill Farm in Steventon near Abingdon, Oxfordshire, where headline acts included the Maccabees, Two Door Cinema Club and The Wombats.

The festival, running since 1998, describes itself as the 'UK's most warped village fete' and says it is a 'four-day celebration of the best new and established artists, filled with whacky entertainment and a unique community spirit'.

But numerous guests last weekend complained of severe stomach ache - and it quickly emerged that most of them had recently eaten food from the 'Yorky' fast food stall.

The stall was closed down on the orders of festival organisers on Sunday morning after they heard repeated anecdotal reports of people becoming ill soon after eating there.

An image of the stall appears to have been removed from the website of Truck Festival since the weekend but a screenshot taken earlier shows the stall and what it was offering.

It was billed as: 'Traditional Yorkshire roast wraps with trimmings.'

The Yorky stall (pictured) at Truck Festival is believed to be behind dozens of food poisonings

Tickets for the popular four-day indie music festival, dubbed the 'UK's most warped village fete', cost £320

And it added: 'A choice of British Roast Pork, Premium Pork Sausage, Roast Chicken, served in a Giant Yorkshire Pudding with creamy mash potato. Steakhouse chips, stuffing, gravy and mushy peas.'

One woman was reportedly so ill she was rushed to the A&E department at nearby John Radcliffe Hospital in Oxford for urgent tests where doctors told her they suspected food poisoning.

Posting on Truck Festival Chat, one music lover said: 'Shall we discuss the elephant in the room - who else got food poisoning from a Yorkshire pudding? Being that ill with those toilets is NOT for the faint of heart.'

Another replied: 'Yup, only just recovered. Luckily, I was staying off site, how on earth did people who camped manage? Definitely needs to be reported. Yorky needs to review their practice. And Truck need to review who they invite to sell to their punters.'

While another replied: 'Me! And it definitely was the Yorkie (sic) I had on Saturday night. Luckily our Zodiac [camper vehicle] has loos but it wasn't fun having to miss bands for trips there all day.'

Another attendee claimed to have highlighted to staff on the stall that the chicken in their £17 meal had not been cooked properly, although it wasn't clear if she ate the food or became ill.

One woman who fell ill posted a reply she had received from Truck bosses which read: 'I can tell you that on Sunday morning we were made aware of similar reports via our medics.

'Our health and safety team was able to quickly identify the suspected source. Which was removed from operation shortly afterwards (within 90 minutes of the first report).

The stall advertised its food as 'traditional Yorkshire roast wraps with trimmings'

The festival in Oxfordshire has been running since 1998 and is a 'four-day celebration of the best new and established artists, filled with whacky entertainment and a unique community spirit'

'During the day we also completed and passed on a report to the local EHO who we are assisting in carrying out further investigations.'

Festival goers appeared to have eaten a wide range of items from the stall including, pork, mushy peas and mash potato but it is not clear which items may have been contaminated.

One festival goer, speaking on condition of anonymity, told the Daily Mail: 'I was there with my wife and kids. It's a really family-orientated, middle-class affair.

'But it soon became clear that a lot of people were ill. A couple camping next to us were in the medical tent all day on Sunday.

'I saw a lot of people repeatedly rushing to the toilets which were mobbed. The medical tent was handing out Imodium left right and centre.'

They added: 'The festival organisers in fairness seem to have traced the source very quickly and it was immediately shut down but people had been eating from the stall all day Saturday.

'It was a pretty awful thing to see, and it will have ruined the weekend for a lot of people. It's all anyone who was at the festival is talking about. There is talk of taking legal action.'

The Yorky stall is understood to be run by a company called Event Mobile Catering based in Cardiff who have a number of food outlets for outdoor events.

Their website cites catering at festivals including Glastonbury, Boomtown, Download and Creamfields and well known permanent venues like West Ham's London stadium, the Principality Stadium in Cardiff and Silverstone.

The company did not respond to requests for comment.

A spokesperson for Truck told the Mail today: 'On Sunday morning, our on-site medical team received reports from a number of attendees with similar symptoms.

'Our Health and Safety team launched an immediate investigation and identified a third-party food vendor as the suspected source. That vendor was removed from operation within 90 minutes of the first report.

'We reported our findings to the local Environmental Health Officer the same day and are supporting their ongoing investigation into the cause. We share the disappointment and frustration of those whose weekend was affected.'

A spokesperson for Vale of White Horse District Council, said: 'We have been made aware of a potential food poisoning outbreak at Truck Festival. Truck Festival reported the issue to us and said that a number of festival goers reported the food poisoning symptoms to the medical tent. From this, after some investigations, they were able to quickly identify a potential source and Truck Festival closed the stand.

'We are investigating the issue and are working with the food business, Truck Festival, UKHSA and the trader's own local registering authority.'

The spokesperson added that he registering authority is Cardiff City Council and because the investigation is ongoing they were not able to say any more at this stage.

A similar outbreak of food poisoning at the Download festival in Leicestershire two years ago, said to have affected as many as 500 people, resulted in a class action brought by legal firm Irwin Mitchell.

Symptoms of food poisoning include nausea, diarrhoea, stomach cramps, high temperature and general illness.

The NHS says that food poisoning can be caused by eating contaminated food, which may result from improper cooking, storage, handling by an ill person, or eating past its expiration date.