Kate Middleton

While Prince Harry might be battling sub zero temperatures in the South Pole, girlfriend Cressida Bonas appears to be having a much easier time of it - as she was spotted out this weekend in Camden, North London.

The leggy blonde headed to indie hangout Koko along with half-sister Isabella Branson to support their brother Jacobi Anstruther-Gough-Calthorpe whose DJ crew Housekeeping was launching a new event, Seven Deadly Sins at the famous venue.

Jacobi, 30, threw the night following a successful stint at Lio club in Ibiza earlier this year. The dancer, who is separated from her boyfriend of 18 months for the next few weeks while he undertakes a charity trek to the South Pole with injured servicemen and women, didn't appear to be missing him too much as she partied until 3am, according to the MailOnline.

Cressida and sister Isabella reportedly partied until 3am (WENN)

Camden's not the usual hangout for the royals, who usually prefer the delights of Mayfair, but we wonder if Cressida could tempt the royals to branch out from his usual haunts? We wonder if she extended an invite to Kate Middleton, the Duchess of Cambridge for the night out?

Cressida Bonas is rumoured to be close to Kate Middleton, Duchess of Cambridge (Photo: WENN)

After a frosty beginning the pair are said to have become close as they bond over the shared troubles of life as a royal WAG.

"Cressida is so happy to have Kate on her side, especially now Harry's almost uncontactable," a source told LOOK Magazine.

Kate at a charity visit to Place2Be (SplashNews)

After waiting over a decade to marry Prince William, Kate knows what it's like to be a royal girlfriend in the spotlight and is reportedly helping Cressida cope with the attention.

"Kate has made PR mistakes in the past too. I think she regrets not finding a job to settle down to before getting engaged to William - the 'Waity Katie' tag still haunts her today," the source went on.

"So Kate can talk to Cressy about that and also point out the attention she'd get if she carried on with the dancing," they explained, "Every time she put on a leotard to perform, the pictures would be splashed all over the world - and not for the right reasons."

Will Prince Harry marry Cressida? (Photo: WENN)

It's believed Cressida and Harry are so serious, the blonde socialite has sacrified her career as a dancer to take on a more royal friendly job.

Something the 24 year-old is said to be coming to terms with: "It's an exciting time and although it's sad that being a dancer has to be sacrificed, there will be so much she can still do."