“In circumstances where an officer of Revenue and Customs considers it necessary for the protection of the revenue, the officer may require a person described in regulation 97P(1) (persons from whom security can be required) to give security or further security for the payment of amounts in respect of which an employer described in regulation 97O (employers) is or may be accountable to HMRC under regulation 67G[, as adjusted by regulation 67H(2) where appropriate]2, 68 or 80 (payments to HMRC and determination of unpaid amounts).”
“The persons are— (a) the employer, (b) any of the following in relation to the employer— (i) a director, (ii) a company secretary, (iii) any other similar officer, or (iv) any person purporting to act in such a capacity, and (c) in a case where the employer is a limited liability partnership, a member of the limited liability partnership.”