Is this the type of role?
TRAINEE ENGINEERS - Manufacturing
Three vacancies have arisen within our Manufacturing department for Trainee Engineers.
http://www.keymed.co.uk/index.cfm/page/careers.detail.cfm/sub/Details/id/4388/navid/180/parentid/0
Looks a nice company!
With regards to their expectations, if you mean what technical ability you might bring, I doubt they expect much!
If they are planning on putting you through any kind of training scheme they will want to know that you are bright and can learn. I work for an aerospace company and have guided/supervised two placement students and one graduate, all from university engineering courses. A lot of things they learned never get used, those that are used mostly only provide the basic foundation to build experience on.
I would expect that they are going to be more interested in your enthusiasm, willingness and ability to learn new things, and in how well you will fit in with the company's culture than with any technical stuff.
Research the company. LOTS. My housemate recently got a job with Eurostar and the interviewers were very impressed that he knew about their business, passenger loads, routes and history. It shows that you are really interested, and that you can self motivate to find things out for yourself. Working with someone who isn't proactive in this way is like trying to bounce a ball on sand, its hard work and quickly becomes annoying.
Don't talk too much. There is that old adage "Better to keep silent and be thought a fool than to open your mouth and prove it." You are bound to be asked questions, and it would be good if you have a few intellegent questions of your own, but don't overdo it
Some people get nervous and talk themselves right out of jobs.
Very best of luck!!