Britain's Prince Harry and his wife Meghan Markle will return to the UK for their final public engagements as full royal family members later this month.

A spokesman for the couple said they will take part in at least six more engagements, before they officially step back as senior royals on March 31st.

These include Harry attending a recording session with rock star Jon Bon Jovi and the Invictus Games Choir at the end of the month, while Meghan will be marking International Women's Day a week later.

Their final engagement will be with the entire royal family at a commonwealth service at London's Westminster Abbey on March 9th.

They will also attend the Invictus Games - a sporting competition founded by Harry for wounded British military personnel - together in May, but will not be there in a royal capacity.

It comes after the couple announced plans last month to give up their roles as senior members of the British royal family and have financial independence.

Experts have suggested the 'Sussex Royal' brand - used on the couple's website and Instagram - could make an "absolute fortune", but discussions over whether they can continue to use it are believed to be under review.

The "royal" part of their 'Sussex Royal' moniker has proved to be a sticking point, with a source indicating that the use of the word "in this context, needed to be reviewed".

The use of the title 'Sussex Royal' is thought to be a sticking point | Image: Sussex Royal website

The UK Daily Mail reported on Wednesday that the couple would no longer be able to use the 'Sussex Royal' brand.

The royal source added: "Discussions are still ongoing."

"As part of the process to transition the Duke and Duchess of Sussex into their new chapter, planning has been well underway around the launch of their new non-profit organisation. Details will be shared in due course."

In the statement on Wednesday, the couple's spokesman said a 12-month transition period would come into effect on March 31st, in order for official arrangements on the split to be agreed.

It added that the pair would be represented by a team from their UK foundation from April 1st, since their office at Buckingham Palace was "no longer needed".

"In general, the themes of their cause related work will remain unchanged," the statement said, adding: "which includes the commonwealth, community, youth empowerment and mental health, collectively".

"The duke's priorities remain supporting the welfare of servicemen and women, conservation, sport for social development, HIV and Travalyst which works to mobilise the tourism and travel industry for social good.

"For the duchess, her focus remains women's empowerment, gender equality and education."

Harry and Meghan are planning to be in the UK "regularly", the spokesperson added, but will split their time with North America.