Any girls planning on stealing a kiss from Prince Harry during his forthcoming visit to Australia have been warned they might not get so lucky this time around.
The last time the prince dropped by Sydney for a visit two years ago he was inundated with kisses and marriage proposals.
But Dai Davies, former head of royalty protection for Britain's Metropolitan Police, says security will attempt to stop such incidents when the prince touches down in the harbour city next week.
"It's a balance. Whilst he might like it, you never know the motives, so if possible we try and stop it," Mr Davies told AAP from the UK.
The 32-year-old prince will be back in Sydney to cast a royal eye over preparations for the Invictus Games - a competition he founded in 2014 for injured servicemen and women and veterans from across the globe - to be held in the NSW capital in October 2018.
Despite next week's visit only being a two-day stopover, planning for such an event takes time, with Prince Harry's minders visiting Sydney ahead of time as part of their preparations, Mr Davies says.
"Pre-planning and pre-visits where his private secretary and personal detectives will be out there ahead to ensure as far as humanly possible that every conceivable factor has been taken to ensure the best security applies."
Following the recent Manchester Arena terror attack that killed 22 people, security will be tight, but Mr Davies says each visit is assessed on its own merits, noting Australia's terror rating isn't as high as the UK.
"Australian authorities will work closely in conjunction with Prince Harry," he said.
"The Australian authorities are as competent as any security service in my opinion."
NSW Police, federal and state governments along with Invictus Games organisers have been working closely to ensure the prince's safety during his stay while minimising disruption to the public, Assistant Commissioner Kyle Stewart says.
"While this will require some additional security measures, His Royal Highness Prince Harry will have every opportunity to experience our friendly and welcoming way of life," he said.
Before visiting Sydney next Wednesday, the prince will be in Singapore to play in the Sentebale Royal Salute Polo Cup.
Sentebale, a charity founded by the prince and Prince Seeiso of Lesotho in 2006, provides support for children living with HIV in Southern Africa.
Sentebale is the Lesothian phrase for 'forget me not'.
