Since you said he pleaded guilty and since it is now being dealt with in the Crown Court I assume that, following his guilty plea at the Magistrates' Court, the magistrates decided that their powers of sentencing (maximum six months custody) were insufficient. As a result they sent him to the Crown Court for sentencing where he will be sentenced by a judge. Please tell me if this is incorrect. (For example, he may have initially pleaded not guilty and elected Crown Court trial himself, and then changed his plea).
If my assumptions are correct, the magistrates would have had more detail than we have here when making their decision and they believed a sentence of more than six months was warranted. For that reason I cannot understand how his solicitor can suggest that he "...don't even have the thought of prison in his head as he will not be going to prison" as, from what you tell us, it is a distinct possibility.