Highly regarded aid worker was dedicated to helping others

A British man killed in a deadly siege in a Kenyan hotel worked for Gatsby, the international development charity.

Luke Potter was one of 21 killed after militants stormed the Dusit hotel in Nairobi.

Gatsby said it was shocked and saddened at his death.

Potter was a devoted worker, dedicating his life to the cause of helping others, the charity said.

"Luke was respected by all he worked with, bringing huge drive, determination, a relentless work ethic, and a thirst for new ideas to every project," a statement read.

"He brought a calm head and his unique sense of humour to every situation."

Somalia militant group al-Shabab said it was behind the attack.

Kenyan forces accompanied by an off-duty British SAS soldier successfully took control of the hotel after the deadly stand off.

The UK High Commissioner to Kenya, Nic Hailey, confirmed the death on Twitter.

"I'm very sad to confirm that we believe at least one British national has been killed in the attack," he said.

"We are providing our support to his family and friends at this very difficult time."