Why Prince William doesn't wear a wedding ring but Harry is never …

Prince William and Kate celebrated their wedding anniversary over the weekend - 12 years after tying the knot in a lavish ceremony watched by millions around the globe. To mark the occasion, the royal couple released a photo of them riding bikes under blue skies, captioning it with "12 years" and a heart emoji. The picture, snapped by Matt Porteous, shows the pair smiling with their arms round each other.

But anyone paying close attention may notice something odd about William's left hand, which appears to be missing his wedding ring. In fact, the new Prince of Wales has never worn a wedding ring - and never plans to do so.

Kate Middleton's emotional chat with fan about Diana and reveals new engagement ring detailPrince William and Kate issued a new photo to celebrate their wedding anniversary (Matt Porteous)

In March 2011, one month before the Royal Wedding, St James' Palace confirmed that William wouldn't be wearing a wedding band. A Palace insider said at the time: "He's not one for jewellery.

He's never worn any. He decided he didn't want to wear one now. It's all down to personal preference.

"Catherine will wear a ring fashioned from a lump of Welsh gold owned by the Royal Family that has been smelted down. "The couple have both had a hand in the design. This is the ring Prince Harry will carry and hand over in the traditional way."

Meanwhile, Harry can often be seen twiddling with his ring, which is a platinum band with a textured finish that is made by jewellers Cleave and Company.

Prince William has never worn a wedding ring (Getty Images)Harry can often be seen twiddling with his ring (Getty Images)

Meghan's wedding ring is also made by Cleave and Company and is fashioned from a piece of Welsh Gold - as is tradition for royal brides. She wears it alongside her engagement ring, which consists of two diamonds from Princess Diana's collection and one from Botswana. And although Kate backs William's decision, she does wear a wedding band alongside her sapphire engagement ring, which once belonged to Princess Diana.

Last week, the Princess of Wales shared some new information about the stunning piece after it was complimented by a royal well-wisher. Kate said: "It's the same ring and it was exactly the same size when I tried it on." She made the comments during her two-day trip to Wales with William, which saw the couple travel to Aberfan to pay their respects to the 116 children and 28 adults who tragically died in 1966.

Locals gathered in the street to greet them and one survivor of the disaster, David Davies, a pupil at the school at the time, showed them around the garden. They met trustees from the Aberfan Memorial Trust who are involved in ensuring the maintenance of the garden, alongside some of the Aberfan Wives group who lost relatives in the disaster. They later bowed their heads to pay their respects to the victims and left a floral tribute, which simply read: "In loving memory."

The memorial garden, opened by the late Queen in 1974, stands on the site of the former school and commemorates the victims of the disaster.

William's late grandmother visited Aberfan eight days after the tragedy and shortly after a mass funeral had taken place.

Her decision not to visit sooner was said to have been one of the greatest regrets of her reign.