I am not a solicitor, and there is a forum for legal advice. I blew 56, so was in the same band as you if a little higher. You will get a ban within the 12 to 16 months range, and a fine based on your income. You will also be offered the Drink Driving Awareness course we reduces your ban by upto 1/4. This means if you get banned for 12 months, and are offered and take the course, your ban is reduced to 9 months.
The actual length of the ban will depend on mitigating and aggravating circumstances. If you have no criminal record, was alone in the car, you did not crash or injure anyone, and you have a good driving record, then the courts will probably ban you for 12 months. Though Magistrates are fickle, so do not take that as gospel.