“There’s no kissing and no hugging at the moment because of the pandemic. She misses that and can’t understand why.
“That’s the type of short-term memory loss that is very obvious.”
He added: “She’ll ask, ‘Why are we not doing that?’ and I have to tell her it’s because of the pandemic. Then shortly afterwards, she’ll ask the same question.
“We’ve lost one very good friend to the virus and had several friends who have been identified as having it but have survived.”
Sir Jackie’s memories series is set to be released over the next few months and they feature HRH the Princess Royal, Prince Salman, the Crown Prince of Bahrain, His Serene Highness, Prince Albert of Monaco, tennis star Rod Laver, Nick Mason of Pink Floyd, impressionist Rory Bremner and opera singer Dame Kiri Tekanawa.