Plea bargin ..

If you are not represented by a lawyer, yes.

Many plea negotiations take place before or between court dates. If you have an attorney he or she could negotiate with the prosecutor before you go to court. If you don't have an attorney, the prosecutor most likely will not deal with you until after you have acknowledged your right to be represented by an attorney and you waive that right in writing.

Not if you can get the solicitor to talk to you ahead of time.

No. You can try to contact the prosecutor assigned to your case before your court date.