@Viviennemary
I am firmly convinced Thomas was not invited to the wedding. He said himself he had received no official invitation. I'd love to have absolute confirmation if he received an official invitation or not. Because that could make all the difference to this story of she said he said. Why didn't Harry meet him once in the two years they dated.
According to the Sunday Times article, Thomas had been invited, transport had been arranged, including a chauffeur driven limo to and from the airport. After he was found to have colluded with a photographer, Thomas apparently stopped replying to Megan's texts. Apparently Megan sent 20 texts and he didn't respond to them. Apparently they concluded he wasn't coming through what he said to the tabloids. The article says:
"But to spare his daughter and the royal family any further embarrassment, he would no longer attend the wedding."
But at no point did he actually turn down the invitation and say he wasn't coming. So, that would suggest they inferred his intentions from interviews he gave and cancelled the arrangements. He couldn't reply to Megan and Harry's text or tell them about his plans because he was in hospital having a heart attack.
They took his silence to mean he wasn't coming. Again they interpreted his intentions without him actually saying anything.
The book twists events and makes out that Megan is the wronged party. It's beyond belief. It says she was "willing to move on". She placed "some of the blame on herself." (How generous of her.) There is a lot of emphasis on what they bought for him: a bespoke suit and shoes was waiting for him, he would be put up in a hotel, he'd have an 'assistant' in London and someone to guide him through the airport. Megan was "embarrassed" in front of the Queen, apparently. But at no point does it say she was upset, or that she would actually miss her father's presence. It's all about how she was wronged by him.