Ms Seward said: “The Queen and Sophie actually have a lot of things in common.
“They both love military history, they both love riding, the country life and they both live Edward.”
Mr Kay added: “There is no doubt that Sophie has been the making of Prince Edward.
“In many ways he was a charmless young man, but she has grounded him out.
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“She has brought a simplicity to their life, theirs had been an incredibly happy marriage.”
During the same Channel 5 documentary, Dr Anna and Rebecca English discussed Prince Edward and Sophie’s wedding.
Ms English said: “Sophie and Edward wanted something that was a bit more personal, a bit more family orientated.
“There was just a really joyful family feeling about it.”
Mr Smith said: “I don’t have any thoughts either way on someone getting married, but I think they have possibly realised that they can’t keep demanding lavish weddings.
“I think that the Eugenie wedding did not go down too well, people weren’t too excited about it and they were concerned about the cost.
“During this coronavirus crisis I think people would have been particularly unimpressed if Beatrice’s wedding had been lavish.
“It was the right thing to do but they should have done the right thing years ago and all the other weddings should have been the same sort of size.”