We spoke to Kirsty Lang, who knew Jon for four decades - she was a long time colleague of Jon's here at Channel 4 News and interviewed him for an article in the Daily Mail.

'Dear girl, how wonderful to see you,' my friend Jon Snow says. 'Have you been here before?' There it is. The dawning realisation that Jon might not know who I am.

Jon Snow is set to share his experience in a Channel 4 documentary