In my humble opinion it is not an offence under the RR(FS)O 2005 if the Responsible Person, upon whom the Notice was originally served, sells the premises without informing the Enforcing Authority and/or the new owner.
The offence under Article 32(c) is to “fail to comply with any requirement imposed by Article 29(3) or (4) (alterations notices)”:
(3) Where an alterations notice has been served in respect of premises, the responsible person
must, before making any of the changes specified in paragraph (4) which may result in a
significant increase in risk, notify the enforcing authority of the proposed changes.
(4) The changes referred to in paragraph (3) are—
(a) a change to the premises;
(b) a change to the services, fittings or equipment in or on the premises;
(c) an increase in the quantities of dangerous substances which are present in or on the
premises;
(d) a change to the use of the premises.
As a change of ownership does not constitute a “change” by definition of Article 29(4) no offence will have been committed.
I stand to be corrected.