My name is Alex Hughes and I'm happy to help with your question today.
What is being alleged against your husband?
OK that doesn't sound like gross misconduct but they should disclose more information before a disciplinary meeting which should make the position clearer. Your husband can certainly speak to a solicitor now to obtain some advice but the solicitor will not be able to accompany him to a meeting. Only a work mate or union rep can attend. Once the process is complete, if your husband is unhappy with the decision, he can take further legal advice on making a claim to the Employment Tribunal.