Unfortunately, I doubt that a court solicitor will be available. The one who is "on duty", is normally only on duty for legal aid (although in some circumstances it is possible to instruct them privately). I would be inclined to contact a criminal solicitor in the area where you are being prosecuted and instruct them to act.
In terms of exceptional hardship, as Ethel says the loss of your job is not considered to be "exceptional" hardship, but a normal consequence of losing ones licence (the leading case is one of a taxi driver). The Courts are more sympathetic to the hardship that falls on others. So if the loss of your licence would mean the loss of employment for others, or if you have dependent relative who relies on you for transport to say, medical appointments etc, that will be considered.
Depending on the type of offence, you could plead special reasons too (if this is a speeding offence, the only special reason likely to work is that of "established emergency").