A DURHAM University academic who was pardoned days after being given a life sentence for spying in the United Arab Emirates is back in the arms of his wife.

Matthew Hedges was freed on Monday after a high-profile battle with the Gulf state ally, but officials persisted in calling him an MI6 spy - a claim denied by family and colleagues.

Mr Hedges, from Exeter, appeared in a picture on social media, kissing his smiling wife, Daniela Tejada, after landing back in the UK.

Ms Tejada posted the picture on Twitter and wrote: "Thanks for collectively helping me to bring back my husband.

"We've been through hell and back and would really appreciate having some space to catch up on much-needed rest.

"Kindly asking you to please respect our privacy and our families' - they too deserve your consideration."

In his first statement issued after landing at Heathrow Airport on Tuesday morning, Mr Hedges praised his "brave and strong" wife, saying "seeing her and my family after this ordeal is the best thing that could have happened".

Mr Hedges, a PhD student at Durham University, was sentenced last Wednesday after being arrested at Dubai Airport as he tried to leave on May 5.

"I don't know where to begin with thanking people for securing my release," Mr Hedges said.

"I have not seen or read much of what has been written over the past few days but Dani tells me the support has been incredible.

"Thank you so much to the British Embassy and the FCO (Foreign Office) for their efforts in ensuring I arrived safely back home.

"I could not have done this without Daniela, I hear her face is everywhere!

"She is so brave and strong. Seeing her and my family after this ordeal is the best thing that could have happened. I thank you all once again, this is very surreal."

His wife mounted a campaign to free the 31-year-old and Foreign Secretary Jeremy Hunt personally discussed the case with UAE leaders.

"I am so happy to have my Matt home," said Ms Tejada.

"Thank you once again for the overwhelming support we have received, especially from the embassy in the UAE and the Foreign Office in ensuring that Matt was safely returned home. We are overjoyed and exhausted!

"Thank you once again as well to the international community and the international media, who were very supportive from the beginning.

"I hope you can all understand that Matt and I, as well as his family, really need some time to process everything that we have been through.

"No-one should ever have to go through what he did and it will take him time to heal and recover. He is very overwhelmed.

"To say we are happy is an understatement."

Earlier, she said news of the pardon brought her family's "nightmare" to an end, and Mr Hunt described it as "fantastic".

At a news conference in Abu Dhabi on Monday, officials showed a video of Mr Hedges describing himself as a captain in MI6 during what appeared to be a court hearing.

However, MI6 - the foreign intelligence service - is not known to use military ranks.

An official told reporters in Abu Dhabi that Mr Hedges was "100% a full-time secret service operative" who was in the country "to steal the UAE's sensitive security national secrets for his paymasters".

He said the Briton's pardon came in response to a letter from his family appealing for clemency and due to the historical close ties between the UK and the UAE.

"His Highness has decided to include Mr Matthew Hedges among the 785 prisoners released," he said.

The UK takes a "neither confirm nor deny" approach to allegations of intelligence service membership, but Mr Hunt has previously said he has seen "absolutely no evidence" to suggest Mr Hedges is a spy.

Following the pardon, Ms Tejada, from Bogota in Colombia, continued to reject the accusation that her husband was a spy.

UAE minister of state for foreign affairs Anwar Gargash said the pardon would allow the two countries to "return our focus to the underlying fundamental strength of the UAE-UK bilateral relationship", the WAM Emirates news agency reported.