Plan carefully. Do you know where you are going and how to get there? Who are you seeing?
Make sure you know the names of the people who will be interviewing you. Practice saying them if they are difficult to pronounce.
There's no such thing as enough preparation for an interview. Find out everything you can about the company and what it makes or does. Look for current news - show you are up to date.
Why does this job exist?
Prepare for rejection. On balance you will be rejected more times than accepted. Even if you don't get the job, you can learn a huge amount about your perceived market value. Remember - there's a job out there for you somewhere - more people are working in the UK than ever before.
