Former colleagues of Hemsby student Hannah Witheridge came together to let off a string of brightly coloured balloons in her memory.

%image(14961300, type="article-full", alt="Library photo of Hemsby student Hannah Witheridge, 23, released by her family who said she was a loving young woman who "poured joy into the lives of all who knew her".")

Staff at Archant, where the 'beautiful' 23-year-old worked for eight months, wrote her name on each of the balloons before releasing them.

Their tribute comes as police in Thailand continue to hunt her killers two weeks after her brutal murder.

Miss Witheridge and fellow Briton David Miller, 24, from Jersey were killed on the tiny island of Koh Tao. Their bodies were discovered in the early hours of September 15 on the island's main Sairee beach.

During her time at Archant Miss Witheridge helped run wedding shows across Norfolk and Suffolk.

General manager Diana Sims said colleagues felt it was a 'fitting tribute' to let off the balloons at the EDP's wedding show at Dunston Hall on Sunday - the last event Miss Witheridge worked on before she left to study for a masters in speech therapy at the University of Essex in 2013.

Mrs Sims said: 'We let them off all together, they were all chained together, and everyone gave a big cheer as they went off.'

Thai police are now offering a reward of more than £13,000 in their bid to catch the killers.

Police colonel Kissana Phathanacharoen said a reward of 700,000 baht was now being offered for information which leads to the arrests of the culprits.

'We're working around the clock,' he said. 'We're trying to narrow our inquiries and collect more evidence. We're encouraging the public who many have information to come forward.

'We're checking DNA but this is not the only thing we are looking at to prosecute the suspects.'