Kylie Minogue was expected to be reunited with Jason Donovan at the Hit Factory show. Photo: Sean Dempsey/PA Wire

The Hit Factory concert in Hyde Park which was to reunite Kylie and Jason tomorrow has been cancelled due to the effects of recent bad weather.

Organisers have pulled the plug on the massive outdoor show celebrating the pop music of Stock Aitken and Waterman despite promoters spending hours trying to get the site into a fit state after the ground was churned up by heavy rainfall and visitors to last weekend’s Wireless concerts.

Their efforts at the royal park have proved in vain and the site was declared “unfit” this morning.

Other upcoming shows starring Bruce Springsteen and Madonna are currently unaffected and will go ahead as planned.

The Hit Factory show - featuring many of the acts producer Pete Waterman had catapulted to fame - was due to reunite Kylie Minogue and Jason Donovan, performing their chart-topping hit Especially For You.

Promoter Live Nation and The Royal Parks, which operates the site, said they “sincerely regret the disappointment caused by this cancellation”.

They added that safety of customers, performers and production staff was “of utmost importance and the decision was made unanimously”.

Fans are being advised to seek refunds from the place they bought tickets, although those who purchased through Ticketmaster and See Tickets are being promised automatic refunds.

John Probyn, chief operating officer of Live Nation, said: “The moment the Wireless Festival ended, we put in place a massive plan to prepare the site for tomorrow.

“Eight thousand cubic metres of wood chip is currently being put in place, and over the past 24 hours crews have started to make the site safe for our customers.

“Despite best efforts, time has beaten us, but I want to reassure that Hard Rock Calling concerts with Soundgarden, Bruce Springsteen and Paul Simon, plus Madonna on 17 July and the BT London Live Opening Ceremony Celebration concert and the events will go ahead.”

Manager of Hyde Park Steve Edwards said: “Wood chip is being laid on the concert site as part of plans to ensure concertgoers can be welcomed back as soon as possible.

“We are confident that the action being taken will enable Hard Rock Calling and the remainder of the summer concert series to go ahead as planned.”