The bailiffs clamped your vehicle while it was being used by someone.

Bailiffs may not clamp or take vehicles of the debtor that is being driven by any person if such action is likely to result in a breach of the peace.^[1][2]

If you resist the bailiff clamping the car, then that could be a breach of the peace, rendering the enforcement illegal, and the debtor may sue for damages.^[3]

"in use" means that the item is in the hands of, or being operated by, the person.^[4]

If a bailiff drags you out of a car, so they can take control of it, then enforcement fails because bailiffs cannot use force against people.^[5]

Bailiffs may counter that sitting in a car before taking control ot it, commits an offence of obstructing an enforcement agent,^[6] but nobody has ever been convicted in those circumstances.

For a conviction to succeed, the bailiff must be lawfully acting as an enforcement agent, but he is not while acting in breach of regulations prohibiting taking control of an item in use by anyone.^[1]

^{[1] Regulation 10 of the Taking Control of Goods Regulations 2013
[2] Paragraph 13(3)(b) Schedule 12 of the Tribunals Courts and Enforcement Act 2007
[3] Paragraph 66(5) of Schedule 12 of the Tribunals Courts and Enforcement Act 2007
[4] Regulation 10(3) of the Taking Control of Goods Regulations 2013
[5] Paragraph 24(2) of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[6] Paragraph 68(1) of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007}