Britney Spears has allegedly penned a letter of support to Britain's Prince William following his spilt from Kate Middleton.

The 25-year-old singer believes she understands the pressures of such a public break-up and was eager to offer her commiserations.

Britain's Prince William visited his local movie theatre alone on Tuesday night, fuelling speculation he is already missing ex-girlfriend Kate Middleton.

The prince - who ended his four-year relationship during a skiing vacation - left his Army barracks at Dorset's Bovington camp to watch Will Ferrell comedy "Blades Of Glory" accompanied only by his police bodyguard.

Bets are still being taken on whether Britain's Prince William and Kate Middleton will get married - despite the couple announcing their split at the weekend. Bookies have been forced to lower the odds to 6-1 on Kate becoming future queen, following a flood of punters backing the prince and his ex getting back together.

Ladbrokes spokesman Nick Weinberg told Britain's Daily Record newspaper: "Most of the bets we have had have been for $99 or $40 but we have had some three-figure bets as well."

Kate Middleton's mother is said to be devastated by claims she was to blame for Britain's Prince William ending his relationship with her daughter. Former air stewardess Carole, 51, has been weeping for two days after it emerged that courtiers branded her "too common" to be the prince's mother-in-law.

A source told Britain's The Sun newspaper: "Carole is at breaking point. She is in such a bad way that Kate has had to comfort her. It is so unfair that someone has got the knives out for Kate's mum. She is an innocent party."

Kate Middleton has faced the world with a smile, just days after her split with Britain's Prince William was announced. The beautiful brunette put on a brave public face and was seen out with her friends and smiling outside her home holding a tennis racket on Monday.

Sources close to the 25-year-old have revealed that the break-up of her relationship with William was more of a mutual decision than has been reported.

Kate Middleton has turned down a nearly $10 million offer to talk about her relationship with Britain's Prince William. The brunette beauty - whose split from the prince was revealed on Saturday - has vowed never to kiss and tell.

A source told Britain's Daily Star newspaper: "Kate has too much self-respect to dish the dirt on anyone. She is a decent person."