I knew him socially (I am good friends with the wife of one of his friends) and came across him many times. He would consider me to be several classes below him and he was uncomfortable around me, it was weird. He didn't know how to behave around me, was nervous almost, so said stupid things, lots of jokes about job centres and the like, newspapers under our clothes to keep the chill out in winter, I can't remember. I didn't choose to spend much time with him. (And I probably acted up my poor roots because his poshness annoyed me).
When he was with his 'own people' he was very different. Smart, had a huge general knowledge, had well thought out opinions on lots of things, listened to what other people had to say, asked good questions, very charismatic, you could see people were drawn to him.
But out of his comfort zone, when he had to make small talk with his friend's wife's working class friend he was just an idiot. It was strange.
I'm still pals with her but I haven't heard her mention him for a long long time and I've never asked, I'm really not very interested.