The milestone of one hundred days until the opening of the Queen Elizabeth Olympic Park reopens is being marked today.

Chief executive of the London Legacy Development Corporation, overseeing the park, Dennis Hone, told reporters during a press briefing at the ArcelorMittal Orbit in Stratford last Thursday that the £292m construction work is on track for reopening the North Park.

The section of the park, which is about the half the size of St James Park in central London, is due to reopen at the end of July, to correspond with the start of last year’s London Games.

Work is currently underway to convert the Copper Box, where handball was played during the games into a multi-use arena, while the temporary basketball arena is being dismantled and relocated.

The North Park will also have a new cafe and community space with a £1million playground featuring trees with huts and water areas.

Major concerts such as Hard Rock Calling will see rockers Kasabian as the first act to play inside the Olympic Park this summer followed by Bruce Springsteen the next day.

Mr Hone said: “We will welcome thousands of visitors back to experience what this exciting new part of London has to offer – from international rock stars and world-class athletes, to new parklands and outside spaces to walk, play and enjoy. The work we are undertaking now will deliver a lasting legacy for decades to come and this summer is just the first part of that journey.”

He said they are currently re-viewing their plans for the next ten years and welcome ideas for how best to adapt the park to the surrounding communities.

Four temporary concert stages will also be built inside the park for this summer’s concerts.

Executive director of the park’s infrastructure, Colin Naish, said the idea is to have concerts around the park until the Olympic Stadium has been converted. He said: That’s the general idea as more residents move into the park. But it depends on the demand and popularity of such events.”

The South Park is due to open in the summer of 2014.

The only part of the South Park which will not be open by then will be the Olympic Stadium, where work to transform it into a venue suitable both for football and concerts will continue into 2015.

West Ham United recently secured a deal to relocate to the stadium in 2016.

At the former Athletes’ Village kitchens are now being installed in the flats, which will become a mixture of mainly privately and socially rented homes known as East Village.