This Practice Note provides information on the liquidity coverage ratio requirements, set out in the Liquidity (CRR) Part and the Liquidity Coverage Ratio (CRR) Part of the Prudential Regulation Authority (PRA) Rulebook, which apply to UK banks, building societies and systemically important investment firms. The primary source for UK prudential requirements has been the onshored Capital Requirements Regulation (Assimilated Regulation (EU) 575/2013—UK CRR) and its level 2 measures. The provisions of UK CRR and its level 2 measures are, however, in the process of being revoked and replaced by provisions in the PRA Rulebook and other PRA policy materials. For information, see Practice Note: Introduction to the UK prudential regime for banks, building societies and systemically important investment firms—UK CRR. The Liquidity (CRR) Part includes rules which correspond to, and are identified by reference to, specified Articles of UK CRR as they applied immediately before revocation. The Liquidity Coverage Ratio (CRR) Part includes rules which correspond to, and are identified by reference to, specified Articles of Assimilated Regulation (EU) No 2015/61 (a UK CRR level 2 measure)