Aussie backpackers are populating the UK by stealth.
They are donating sperm to earn money to fund their travels.
Fertility clinics in London say that up to a third of donors are now people from overseas, many of them Australian travellers seeking cash.
They are apparently very enterprising when it comes to looking at ways to earn extra money while travelling.
That is okay by one spokesman for a fertility clinic - Tim Mott says Britain needs more left-handed batsmen in the gene pool.