After all the digging, the answer is a shrug emoji. There is zero hard evidence, no smoking gun, no palace maid with a diary. The rumors were fueled by the same thing that fuels all royal gossip: a mix of boredom, jealousy, and a desire to see the powerful fall.
In the end, the most convincing argument against Philip cheating is the Queen’s own peace. She died with him by her side, after decades of shared jokes, arguments, and a deep, complicated love. If he had broken her heart, it would have shown on that famous, poker face of hers.
So, pour yourself a cup of tea (or something stronger) and let this one go. The biggest royal scandal of the 20th century might just be a beautiful, boring fairy tale after all. And honestly? That’s way more charming than any tabloid story.