For council tax debts they do not get CCJs' they get a liability orders, and these are NOT time barred.
If you have received a court summons and have not paid the arrears, the local authority can then ask the Magistrates Court to issue a liability order. The outcome of this may be one of the following:
Deduction from your wages through an attachment to earnings
Deduction from Income Support
Deduction from Jobseeker's Allowance
Instruct a bailiff to seize goods from your home to cover the amount of the arrears. For more information on bailiffs.
However what yo must realise is that a liability order is not subject to the Statute of Limitations, which means if can come back to bite you in many years time, and normally by then it is in the hands of the Bailiffs, so your original LO may have been for £200, but that can easily get up to over £1000, with charges etc.
LO's are not registered on your CRFs which is why you have been able to obtain CC's etc
LO's are one of those beasts that we strongly advise you deal with, or the next thing you may know is a knock at the door from the Bailiffs!!