As well as collecting information from the public records of courts, credit reference agencies receive information from all the major banks and credit companies on everyones payment history.
So yes it will show up on your credit file.
Credit reference agencies, and there are only three of them, hold information for approx 6 years. At anytime you can write to them to request a copy of your file. It will cost you �2 per company. Doing this you will get a full report and you will then know exactly what they hold.