[X1Article 8 U.K. Relations between this Regulation and other coordination instruments
1. This Regulation shall replace any social security convention applicable between Member States falling under its scope. Certain provisions of social security conventions entered into by the Member States before the date of application of this Regulation shall, however, continue to apply provided that they are more favourable to the beneficiaries or if they arise from specific historical circumstances and their effect is limited in time. For these provisions to remain applicable, they shall be included in Annex II. If, on objective grounds, it is not possible to extend some of these provisions to all persons to whom the Regulation applies this shall be specified.
2. Two or more Member States may, as the need arises, conclude conventions with each other based on the principles of this Regulation and in keeping with the spirit thereof.]