Thanks for the responses guys.
Yes the debt was written off, then seems to have been bought at a later date
This is exactly what is written on the supplied statement of account.
2009-11-26 - WOAB - Bad Debt Write Off £24674.20
Then
2013-10-15 - ITRX - Sold Off debt bal adjust £1369.89
We don't actually know by whom that was sold off by, and how Cabot obtained the debt.
They are looking to make at leasy a £23,000 profit on a debt they bought for a marginal amount. Totally disgusting behaviour.
Also, the CCA request sent 14th December 2018 was the standard