PAUL AND NANCY: A WALK IN THE RAIN - PHOTOS

He’s currently recovering after being struck with a mystery virus that forced him to withdraw from his tour of Asia.

Stepping out in London, where he’s been resting after flying back from Tokyo on Monday,Paul looked pale as he gingerly took a stroll in the rain.

He was accompanied by Nancy, and the New Yorker was arm in arm with her husband while he held an umbrella above their heads.

Paul is in good cheer as he takes a walk in the rain with Nancy on Tuesday

Despite his health scare Paul was in good cheer and even mustered his trademark thumbs up salute to onlookers after offering an animated wave.

Paul sported a casual hooded top and baggy trousers as he ventured out on a miserable day, while supportive Nancy was equally low key in a waterproof jacket, leggings and trainers.

Paul was hit by the mystery bug on May 16 - just one day after he landed in Japan ahead of his Out There tour. 

Paul offers his trademark greeting while holding an umbrella above their heads

Paul returned from Tokyo this week as he continues his recovery from the mystery virus that forced him to postpone a string of tour dates on his tour of Asia 

He called off the sold-out Japan tour, much to the disappointment of fans - some of whom had paid 100,000 yen ($980) to see him.

Paul was also scheduled to perform at a Seoul stadium on May 28. It would have been his first concert in South Korea.

Speaking after cancelling last week, he said: 'Unfortunately my condition has not improved overnight. I was really hoping that I'd be feeling better today. I'm so disappointed and sorry to be letting my fans down.'

A message on the iconic star's website said: 'Doctors have ordered Paul complete rest and he has been doing all he can to get better.

'Paul has only ever had to reschedule a handful of shows in his entire career and is so upset about this situation, he hates to let people down.'