I can't go into how I have this recommendation, because there is an ongoing and complex legal matter ongoing, but I absolutely cannot recommend Fletcher Day, highly enough. Specifically Emma Nash. They are an excellent and very fair practice. Fairness is genuinely what gets you the best deal. Do not try and get a ball breaking, guns blazing solicitor, as it could harm you in a custody battle. And bear in mind when it comes to a parent with 'bad' behaviour and negative habits...the bar is EXTREMELY low. Convicted Criminals (this is what we are dealing with currently) and drug users still gain access to unsupervised contact, so always keep that in mind. If you can avoid family courts, please do. Once you're in the process you can't get out, and it's very difficult to ensure judge's see things from your perspective, as the family courts focus always falls on the fact that they believe that every child SHOULD have both parents as involved as possible in their lives. Often, they are not right, but this happens frequently. It is extremely hard to show that a child would be better off without unsupervised contact with the other parent, so invariably, a parent who does have a substance issue, or criminal record, will still gain unsupervised contact at some point in the child's life.
Get some really good legal advice on how not to get into the system, if you can. Then you will have a lot more control over what happens to your child. I hope this helps.
I realise that some will have differing advice and experience, but this advise cones from a very long legal battle, that began after some involvement with lazy solicitors, and years later followed up with some excellent work from the solicitors that I mentioned.