Is the taxman immune from suit?

I don't know about this, but state institutions often were beyond the law. Try googling for 'crown immunity.' My fathers car was hit by a hospital van and my fathers insurance had to pay the repair as the hospital claimed crown immunity.

There has been a gradual erosion of this - mainly I think as European legislation has demanded it. I remember when hospital canteens first became liable to be sued for breaches of hygiene regulations such as giving people food-poisoning. It wasn't universally welcomed as there was a concern hospital's hard won cash would be diverted to defending cases or paying compensation.

Neb

Any business which is so underfunded that it is relying on a "'certifying document" to get through the next few weeks, is exactly the sort of company which should not be issued with one.

I thought crown immunity was largely abolished by the Crown Proceedings Act 1947.