Prince Harry and Meghan Markle hold hands while out in London

Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex attend the Your Commonwealth Youth Challenge reception at Marlborough House. Photo / Getty Images

Prince Harry and Meghan Markle are clearly still in the honeymoon phase.

The two put on a very affectionate display in London on Thursday, holding hands and sharing some private laughs at a Marlborough House event which marked the culmination of the Commonwealth Secretariat's youth leadership workshop.

The Duchess of Sussex looked stunning in a yellow dress, designed by Lady Gaga's stylist, Brandon Maxwell, while her hair was uncharacteristically neat in a simple low bun.

Meghan kept her accessories low-key, wearing just a pair of stud earrings and her wedding and engagement rings.

She also appeared to have shunned royal tradition by ditching her pantyhose for the day.

Meanwhile, despite recent reports that they'd had been forced to scale back their public displays of affection due to royal protocol, Harry and Meghan were seen happily holding hands throughout the day.

Prince Harry and Meghan Markle appeared relaxed and happy. Photo / Getty Images

The rumours had been fuelled by a video which surfaced earlier this week, showing Harry appearing to rebuff Meghan's attempt at a PDA during the Young Leaders Reception at Buckingham Palace.

In the clip, published by The Sun, the newlyweds can be seen briefly brushing hands before Harry moves his hands in front of him.

Body language expert Robin Kermode previously told the MailOnline: "The Queen rarely holds hands with her husband in public and this seems to have set an unwritten precedent for the other royals."