Prince Harry has flown to Australia for an official tour meaning he will miss the birth of Kate Middleton and Prince William's second royal baby.

Following a brief visit back home, the 30-year-old left the UK on 27 April and has returned Down Under to visit the Australian Army units in Perth and Sydney.

According to The Mirror, Prince Charles' youngest son will then embark on an official tour of New Zealand from 9-16 May.

With the Duchess of Cambridge expected to give birth any day now, it means that Prince Harry most likely will not meet his new niece or nephew for several weeks.

Prince Harry had jetted from Australia to Turkey earlier in April to attend the Gallipoli centenary commemorations before handing out medals at the London Marathon.

Kate Middleton
The Duke and Duchess of Cambridge could meet their second child any day now Getty

Reports have emerged that the Duchess is now overdue and has allegedly talked with doctors about inducing labour. A source told The Telegraph: "The doctors don't normally wait for more than a week.

"They will probably already have been in touch with Kate and talked about which day would suit her best to go in and be induced if the baby doesn't arrive in the next couple of days."

Similar to the scene ahead of the arrival of the Duke and Duchess' first child Prince George in June 2013, hordes of well-wishers have gathered outside the Lindo Wing of St Mary's Hospital in Paddington.

Bookmaker Coral have revealed that the odds have changed with punters now guessing if the new royal baby will arrive in April or May.

Nicola McGeady said: "Punters are now guessing the royal baby's month of birth rather than the date of birth after the weekend gamble folded, with the odds suggesting that Kate will give birth sooner rather than later."