An unearthed royal letter reveals how the Queen 's father conducted an affair with a married woman.
Edward VIII, who famously abdicated the throne in 1936, lured Lady Sheila Loughborough's husband away so his brother George VI could be alone with her.
The then Prince of Wales convinced Lord Loughborough to play a round of golf with him as a favour to his sibling, who was affectionately known as 'Bertie'.