South African city Durban will on Monday move ­significantly closer to staging the 2022 Commonwealth Games, which is considered a possible launchpad for an Olympic bid.

A short ceremony in ­London is set to confirm the east coast city as the lone contender to stage the quadrennial, 71-­nation multisport event.

The 600-page bid book will be handed to Commonwealth Games Federation officials during a brief mid-day ­ceremony at the official residence of the London Lord Mayor.

Bidding for the Commonwealth event is seen as a possible dress rehearsal for a 2024 or 2028 Olympic bid. No African country has hosted either event.

South Africa has proposed a 12-day Commonwealth Games from July 18 - birthday of the late Nelson Mandela.

Canadian city Edmonton also wanted to play host to the 2022 Games, but withdrew due to financial constraints.

The cost of staging the Commonwealth Games is a sensitive issue in South Africa, where a quarter of the active population is jobless.

Millions of South Africans lack running water and electricity and believe money used to fund the Games should be spent on basic services instead.

National government, local government and sports officials are tight-lipped about costs, saying only that the figures will be revealed Monday.

"The 2022 Games will be ­affordable," South African Olympic body boss Gideon Sam told reporters before flying to London. "About 95 percent of the infrastructure is in place."

Sam says an economic impact study predicts visitors to the Games would spend 12 ­billion rand ($1 billion).

There would also be revenue from ticket sales and shares of broadcast and sponsorship deals.

The Olympic supremo is ­excited about the likelihood of the Commonwealth Games coming to Africa.

"The time has come for ­Africa to host these Games," he said. "We have the infrastructure."

Officials stress that the emphasis will be on upgrading existing facilities with only an athletes' village and a shooting range to be built from scratch.

Another cost-cutter is that most of the venues will be within 2.5 kilometers of the main Moses Mabhida Stadium, a 2010 FIFA World Cup venue.

South Africa has successfully hosted the soccer, rugby union and cricket World Cup tournaments, and there has been much media speculation about an Olympic bid.

Glasgow hosted the 2014 Commonwealth Games and the 2018 edition is scheduled for the Australian Gold Coast.