Specify your career goals and why you would like this role.
Consider your answers. You shouldn't feel pressure to answer rapidly.
Read about popular interviewer questions and devise your answers. Test yourself beforehand with a few test questions.
Job Hunting Tips:
"Follow-up, keep records. No matter what searching tactics chosen, follow-up and making sure you keep tabs are crucial for getting that job. Jobhunters who don't keep this info probably lose useful contacts and plausibility with prospective companies."
Some useful things would be:
Perform other work as needed
Being eligible to work in the UK is mandatory for the job
A background in a comparable position with at least 1 year experience
A 'can do' mentality, prepared to help team mates in a helpful style