I can only contribute to the mountain of tea on him being an insufferable twit. Way back at the beginning of his relationship with Billie around '06/'07, they were starring in a play together called 'Treats' with Kris Marshall. I worked at the Windsor Theatre where it was on before they took it to London. Whether they were exclusive or not I don't know, but over hearing him during rehearsals, he was a demanding, obnoxious little twerp. He would patronize Billie and would purposely get on Kris's Tits with his behaviour. He's been a Bell End for a long time.
(And that's also being kind to Kris Marshall, he's grown up now, but I used to go on nights out with the same crowd as him and he was a bully. )