I had email contact with him about 5 or 6 weeks ago because I had said I would update him when I knew if I had got on the uni course I had applied for. At the end of his email he said "let me know how things progress (if you want to of course)" which made me feel he was open to more contact.
And that's the other thing, I am training to be a T, so there's a very real chance I will be reacquainted with him in future in a professional setting.