Prince William's Plans This Weekend Include Polo – Not Baby
07/09/2013 AT 06:30 PM EDT
Prince William is set to join his brother Harry in playing the game they love this Sunday in leafy Gloucestershire.
Unless Baby Cambridge intervenes, William, 31, fully intends to honor an invitation to take part in a match that will benefit two of his pet causes, homelessness charity Centrepoint and Child Bereavement U.K. The third recipient of money raised that day will be WellChild, of which Harry, 28, is patron.
"Clearly, if the Duchess gives birth before, he won't be there," says a source in the polo world of the game in Cirencester, about 100 miles west of London Sunday afternoon.
Princess Kate has said she's expecting in mid-July and royal sources have also been focusing on dates of early next week. But, she warned well-wishers in Glasgow in April, "apparently babies have their own agenda."
In recent days, William is reported to have been undertaking regular work with his search and rescue squadron in North Wales. Meanwhile, Kate, 31, has been spending time between her parents' home in Bucklebury and her own home in Kensington Palace – which is very close to St. Mary's Hospital, Paddington, where she intends to deliver.