The Statutory Limitation is 6 years from the last time you had contact with them, not the age of the debt.
After 6 years of no contact from you, it can no longer be pursued in court. They can still ask you for the money, you still owe the money and the debt will still affect your credit record.
If you have moved house in that 6 year period and failed to notify your creditors of the new address, the Statute of Limitation Act does not apply and you can be taken to court at any time.
So you are wrong on both counts