69Spire Healthcare Limited PartnershipTypically the Group ensures that it has sufficient cash on demand to meet expected operational expenses for a period of at least 90 days, including the servicing of financial obligations. In addition, the Group has available the following lines of credit:. £56 million acquisition/capex facilities, of which £11.1 million was undrawn as at 31 December 2010. £55 million of revolving credit facilities, of which £37.3 million was undrawn as at 31 December 2010The following are the contractual maturities of financial liabilities, including interest payments and excluding the impact of netting arrangements:At 31 December 2010Carrying amount£000Contractual cash flows£0001 year or less£0001-2 years£000More than 2 years£000Non-derivative financial liabilitiesAmount due to ultimate parent undertakings601,827 (926,898) - - (926,898)Secured bank facilities1,293,653 (1,512,574)(38,134)(47,422)(1,427,018)Obligations under finance leases74,046 (230,469)(6,560)(6,767)(217,142)Trade and other payables56,057 (56,057)(56,057) - - Derivative financial liabilitiesInterest rate swaps210,615 (214,923)(53,128)(45,278)(116,517)Interest rate collars(1,085)581 - - 581 2,235,113 (2,940,340)(153,879)(99,467)(2,686,994)At 31 December 2009Carrying amount£000Contractual cash flows£0001 year or less£0001-2 years£000More than 2 years£000Non-derivative financial liabilitiesAmount due to ultimate parent undertakings537,243 (926,898) - - (926,898)Secured bank facility1,297,275 (1,708,868)(35,667)(56,422)(1,616,779)Other loans24,704 (60,554)(1,976)(1,976)(56,602)Trade and other payables39,314 (39,314)(39,314) - - Derivative financial liabilitiesInterest rate swaps170,872 (184,585)(55,328)(38,768)(90,489)Interest rate collars4,490 (4,560)(4,560) - - 2,073,898 (2,924,779)(136,845)(97,166)(2,690,768)The contractual cash flows for the amounts due to the ultimate parent undertakings have been calculated on the basis that they will be repaid, at the latest, when the bank facilities will mature. The amounts due to the ultimate parent undertakings are repayable on the occurrence of predetermined conditions of the loans, which are assumed to occur no later than the maturity date of the relevant bank facility.

70Spire Healthcare Annual Review 2010Spire Healthcare Limited PartnershipNotes to the financial statementsFor the year ended 31 December 201025. Financial risk management continuedFair value hierarchyThe Group uses the following hierarchy for determining and disclosing the fair value of financial instruments by valuation technique:Level 1: quoted (unadjusted) prices in active markets for identical assets or liabilities;Level 2: other techniques for which all inputs which have a significant effect on the recorded fair value are observable, either directly or indirectly; and Level 3: techniques which use inputs which have a significant effect on the recorded fair value that are not based on observable market data.As at 31 December 2010, the Group held the following financial instruments measured at fair value:Liabilities measured at fair value 31 December 2010£000Level 1£000Level 2£000Level 3£000Financial liabilities at fair value through profit and lossInterest rate cap and floor(1,085) - (1,085) - Financial liabilities at fair value using hedge accountingInterest rate swaps210,615 - 210,615 - 209,530 - 209,530 - During the reporting period ending 31 December 2010, there were no transfers between Levels 1 to 3 fair value measurements.As at 31 December 2009, the Group held the following financial instruments measured at fair value:Liabilities measured at fair value 31 December 2009£000Level 1£000Level 2£000Level 3£000Financial liabilities at fair value through profit and lossInterest rate cap and floor4,490 - 4,490 - Financial liabilities at fair value using hedge accountingInterest rate swaps170,872 - 170,872 - 175,362 - 175,362 - During the reporting period ending 31 December 2009, there were no transfers between Levels 1 to 3 fair value measurements.