Meghan Markle allegedly wrote Taylor Swift a “personal letter” inviting the popstar to appear her much-maligned podcast before she was pictured with the Prince of Wales and his two eldest children at Wembley Stadium last week, a source has claimed. The heir to the throne had posed with the global singing sensation as he spent his 42nd birthday at Wembley Stadium with Prince George and Princess Charlotte, taking pictures with Swift and NFL champion boyfriend Travis Kelce after her Eras Tour concert. But in a bombastic revelation, it has emerged that the viral pair of photos released by both Tay…