The food and drink industry is Europe's largest manufacturing industry with half a million people employed in the UK alone. As such, there's a lot of jobs you can choose from so you need to decide what area you want to work in. Food production, engineering, development, science all require specific skills to go with the knowledge you've already aquired at university so it's wise to research which role you would like and seek out any experience which will help you. Don't let the 2.2 degree put you off applying - employers are keen to hire people with relevant work experience and will place that above a better degree result.
You might find some useful information at www.food.gov.uk or http://www.improve-skills.co.uk/careers.