25. In the event of a contravention of, or a refusal or failure to comply with, a requirement or prohibition imposed by these Regulations on an international grouping—
(a)where the contravention, or refusal or failure to comply would be an offence under these Regulations or under the Health and Safety at Work, etc. Act 1974(1) each railway undertaking comprised in the grouping shall be guilty of the offence and liable to be proceeded against and punished accordingly; and
(b)where a civil remedy would be available to any person in respect of any loss, damage or injury caused by the contravention, or refusal or failure to comply, each railway undertaking comprised in the grouping shall be jointly and severally liable in respect of such loss, damage or injury.