Latitude Festival will go ahead at full capacity this summer with 40,000 fans expected to attend.
The festival in Wangford, Suffolk, on July 22 to July 25 will require fans – many of them teenagers – who have not been vaccinated are tested for Covid on entry.
And the Government has set a target of vaccinating all adults by the end of July, meaning most fans should have had a jab by the time of the festival.
It comes as Festival Republic's managing director said he is 'very confident' that its biggest festival Reading and Leeds will go ahead as planned on August 27 to 29.
Wireless festival is also expected to go ahead in London on July 2 to 4.
Latitude Festival (pictured in 2019) in Suffolk will go ahead at full capacity this summer with 40,000 fans expected to attend
Brit award winner Lewis Capaldi has been announced as Latitude's headliner on the Friday night and festival bosses say they hope 'everyone will have a good time'.
It will be third time lucky for Snow Patrol who had to pull out in 2019 due to illness, and were due to play last year - the event was cancelled due to the pandemic.
The band, who led the line-up at the first ever festival in 2006, will take the Sunday lunchtime slot this summer.
Latitude founder Melvin Benn said he is 'looking forward to some great music' with the show running 'at full capacity', but there will be on-site Covid testing among the safety protocols.
He said: 'Summer is on its way, and we can't wait to welcome everyone back to Henham Park for Latitude Festival in July.
Brit award winner Lewis Capaldi has been announced as Latitude's headliner on the Friday night and festival bosses say they hope 'everyone will have a good time'
'We are aware that many of you may have some concerns regarding safety at the festival.
'We'd like to reassure you all that we are working hard behind the scenes, and will be following all government guidelines and legislation to ensure Latitude is safe for all.'
He said the national vaccination roll-out and large scale testing meant 'we really can go ahead' as long as the situation in July was deemed safe by the Government and all necessary safety protocols were in place.
Under the Prime Minister's lockdown exit plan there will be no limit on social distancing from June 21.
The festival in Wangford, Suffolk, on July 22 to July 25 will require fans – many of them teenagers – who have not been vaccinated are tested for Covid on entry
In the FAQs section, the festival website said it would go ahead 'at full capacity as normal'.
It also said people who had not been vaccinated would be Covid-tested before entry to the park.
Bastille, who were named British breakthrough act at the 2014 Brit Awards, will headline on Saturday night and play their back catalogue of hits including Pompeii and Of the Night.
The festival started in 2006 with a modest crowd of 15,000 and now hosts some 40,000 who are entertained across a variety of stages.
This year the festival is a week later than usual so it falls in the summer holidays.