(15)The cooperation arrangements established pursuant to Article 25(7) of Regulation (EU) No 648/2012 must ensure that ESMA has immediate access in all situations, on an ongoing basis, to all information, including but not limited to information allowing for the assessment of any material risks posed by UK CCPs to the Union or its Member States, either directly or indirectly. The cooperation arrangements are to specify the mechanisms and procedures for the prompt exchange of information related to the clearing activities of UK CCPs with respect to financial instruments denominated in Union currencies, trading venues, clearing participants as well as subsidiaries of Union credit institutions and investment firms; to interoperability arrangements with other CCPs; to own resources; to default funds composition and calibration, to margins, liquid resources and collateral portfolios including haircut calibrations and to stress tests. They are also to specify the mechanisms and procedures for the prompt notification of any change affecting UK CCPs or the United Kingdom legal and supervisory arrangements applicable to UK CCPs and for the prompt notification of ESMA of any developments with regard to UK CCPs that could affect the monetary policy in the Union. The Bank of England is also to cooperate closely with Union authorities in accordance with Article 25(7). In particular, it is important that there are effective cooperation arrangements between ESMA and the responsible United Kingdom authorities regarding the coordination of their supervisory activities, including, in particular, procedures to deal with any emergency situations related to the recognised UK CCPs which have or may have an adverse effect on market liquidity or the stability of the financial system of the Union.