Her Majesty's Preference
The UK bankruptcy problem, though, is HM Revenue & Customs. When a firm fails, they are fist in the queue for payment. Suppliers and customers get left with a few pence for each pound they’re owed. ...It would be better.. if they (HMRC) were in the same queue as all the other creditors.
Even Homer nods - HM Revenue & Customs
HMRC does not have preferential status in the distribution of the assets of an insolvent estate. The former Departments of Customs & Excise and Inland Revenue both lost preferential status on 15 September 2003 under the provisions of the Enterprise Act 2002.
Something that even their debt collectors "don't know" as when I was being chased for an erroneous debt they tried the "preferential creditor" line on me and I was able to correct them and never heard from them again.
UPDATE - The ASI blog post has been silently edited and the error corrected.