You don't actually need any more evidence though do you, you have known for a while? Are you able to put a plan in place to leave or separate from him?
I see this quite often in my work, ask yourself these questions. What is his visa status? Is he studying or working, do you see his money? Does he have spousal visa, no recourse to public funds? Are you planning to have a child? Does his home culture respect women?
Is he keen to have a child? Frequently what happens is you have a child and then when the time comes to reapply for his visa he applies under right to family life, even better if he can show that you are struggling to cope, hence the gaslighting.
The visa process can take years and some men can keep up the pretence for years because they are often living their own life alongside the marriage. Is he often missing from home on some pretence, how much time do you spend together and how equal is it? How old is he, how old are you? Is he building a network of friends who you are not part of? You do realise that his family are aware of the plan.
Meanwhile each woman explains why this man is different to the others who scam. Grooming is a long game, why did you only meet him once did, what did he need to obtain a visa or enter the UK?
I'm not quizzing you I'm asking you to ask yourself these questions.