The Government maintains that in any event it is justified for legislation to take away these claims, because it is fair and in the public interest that service users should pay a reasonable fee for the service, and it is legitimate to rectify a technical mistake in the legal framework.182 The case law suggests that something more is needed, such as that the retroactive legislation is restoring a widely held understanding of the legal position that has been unexpectedly disrupted.183 The Government has provided insufficient information to allow an assessment of whether this is the case.