If you are looking for a job in the UK, there are several things you can do before you leave your home country and after you arrive in the UK. Here are a few suggestions:
Prior to leaving your home country:
Check job advertisements in newspapers which cater to an international market.
Talk to your local Chamber of Commerce. They often have lists of native companies doing business in the UK.
Once in the UK:
Regularly review the job classifieds in UK newspapers and on various websites such as the BBC News, The Guardian, The Scotsman and the Belfast Telegraph.
Go to a local JobCentre Plus to see if there are job openings in the region you are living.
Consider using a private recruiting agency if you are in a specialized sector. Use the phone directory to locate an agency near you.