Relevant Rules means, at any time, the laws, regulations, requirements, guidelines and policies relating to capital adequacy (including, without limitation, as to leverage) then in effect in the United Kingdom including, without limitation to the generality of the foregoing, as may be required by CRD IV or BRRD or any applicable successor legislation or any delegated or implementing acts (such as regulatory technical standards) adopted by the European Commission and applicable to the Issuer from time to time and any regulations, requirements, guidelines and policies relating to capital adequacy adopted by the Relevant Regulator from time to time (whether or not such requirements, guidelines or policies are applied generally or specifically to the Issuer or to the Issuer and any of its holding or subsidiary companies or any subsidiary of any such holding company).