| Financial year end | 
              2007-12-31 | 
              2008-12-31 | 
              2009-12-31 | 
              2010-12-31 | 
              2011-12-31 | 
            
            
            | Income from legacies | 
              £6,876,000.00 | 
              £8,210,000.00 | 
              £7,127,000.00 | 
              £8,575,000.00 | 
              £7,823,000.00 | 
            
            
            | Income from endowments | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Voluntary income | 
              £19,066,000.00 | 
              £20,610,000.00 | 
              £17,776,000.00 | 
              £19,041,000.00 | 
              £19,443,000.00 | 
            
            
            | Activities generating funds | 
              £3,242,000.00 | 
              £3,254,000.00 | 
              £3,374,000.00 | 
              £3,005,000.00 | 
              £3,152,000.00 | 
            
            
            | Income from charitable activities | 
              £4,588,000.00 | 
              £4,067,000.00 | 
              £3,861,000.00 | 
              £3,024,000.00 | 
              £3,765,000.00 | 
            
            
            | Investment income | 
              £1,186,000.00 | 
              £1,294,000.00 | 
              £444,000.00 | 
              £406,000.00 | 
              £615,000.00 | 
            
            
            | Other income | 
              £30,000.00 | 
              £505,000.00 | 
              £103,000.00 | 
              £101,000.00 | 
              £22,000.00 | 
            
            
            | Total income | 
              £28,112,000.00 | 
              £29,730,000.00 | 
              £25,558,000.00 | 
              £25,577,000.00 | 
              £26,997,000.00 | 
            
            
            | Investment gains | 
              £655,000.00 | 
              £-2,356,000.00 | 
              £1,193,000.00 | 
              £1,115,000.00 | 
              £-783,000.00 | 
            
            
            | Gains from asset revaluations | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Gains on pension fund | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Voluntary income costs | 
              £3,690,000.00 | 
              £3,495,000.00 | 
              £3,324,000.00 | 
              £3,930,000.00 | 
              £5,606,000.00 | 
            
            
            | Fundraising trading costs | 
              £809,000.00 | 
              £880,000.00 | 
              £916,000.00 | 
              £1,016,000.00 | 
              £1,006,000.00 | 
            
            
            | Investment management costs | 
              £46,000.00 | 
              £36,000.00 | 
              £22,000.00 | 
              £15,000.00 | 
              £21,000.00 | 
            
            
            | Grants to institutions | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Charitable activities costs | 
              £13,699,000.00 | 
              £14,888,000.00 | 
              £14,772,000.00 | 
              £15,678,000.00 | 
              £18,754,000.00 | 
            
            
            | Governance costs | 
              £187,000.00 | 
              £182,000.00 | 
              £191,000.00 | 
              £208,000.00 | 
              £211,000.00 | 
            
            
            | Other expenses | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Total expenses | 
              £18,431,000.00 | 
              £19,481,000.00 | 
              £19,225,000.00 | 
              £20,847,000.00 | 
              £25,598,000.00 | 
            
            
            | Support costs | 
              £2,630,000.00 | 
              £2,673,000.00 | 
              £2,908,000.00 | 
              £3,425,000.00 | 
              £3,699,000.00 | 
            
            
            | Depreciation | 
              £174,000.00 | 
              £174,000.00 | 
              £193,000.00 | 
              £311,000.00 | 
              £744,000.00 | 
            
            
            | Reserves | 
              £13,776,000.00 | 
              £15,784,000.00 | 
              £10,262,000.00 | 
              £9,305,000.00 | 
              £8,932,000.00 | 
            
            
            | Fixed assets at start of year | 
              £49,291,000.00 | 
              £53,109,000.00 | 
              £84,061,000.00 | 
              £90,278,000.00 | 
              £96,937,000.00 | 
            
            
            | Fixed assets at end of year | 
              £78,419,000.00 | 
              £84,061,000.00 | 
              £90,278,000.00 | 
              £96,937,000.00 | 
              £97,920,000.00 | 
            
            
            | Fixed investment assets at start of year | 
              £20,673,000.00 | 
              £25,310,000.00 | 
              £20,991,000.00 | 
              £25,544,000.00 | 
              £25,337,000.00 | 
            
            
            | Fixed investment assets at end of year | 
              £25,310,000.00 | 
              £20,991,000.00 | 
              £25,544,000.00 | 
              £25,337,000.00 | 
              £26,306,000.00 | 
            
            
            | Current investment assets | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Cash | 
              £3,501,000.00 | 
              £4,000,000.00 | 
              £5,000,000.00 | 
              £3,000,000.00 | 
              £3,000,000.00 | 
            
            
            | Total current assets | 
              £10,480,000.00 | 
              £11,885,000.00 | 
              £13,113,000.00 | 
              £12,724,000.00 | 
              £12,244,000.00 | 
            
            
            | Creditors within 1 year | 
              £3,177,000.00 | 
              £2,331,000.00 | 
              £2,202,000.00 | 
              £2,627,000.00 | 
              £2,514,000.00 | 
            
            
            | Long term creditors or provisions | 
              £1,000.00 | 
              £1,000.00 | 
              £49,000.00 | 
              £49,000.00 | 
              £49,000.00 | 
            
            
            | Pension assets | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
              £0.00 | 
            
            
            | Total assets | 
              £85,721,000.00 | 
              £93,614,000.00 | 
              £101,140,000.00 | 
              £106,985,000.00 | 
              £107,601,000.00 | 
            
            
            | Endowment funds | 
              £8,453,000.00 | 
              £6,080,000.00 | 
              £6,952,000.00 | 
              £7,666,000.00 | 
              £7,054,000.00 | 
            
            
            | Restricted funds | 
              £63,492,000.00 | 
              £71,750,000.00 | 
              £72,842,000.00 | 
              £73,260,000.00 | 
              £75,125,000.00 | 
            
            
            | Unrestricted funds | 
              £13,776,000.00 | 
              £15,784,000.00 | 
              £21,346,000.00 | 
              £26,059,000.00 | 
              £25,422,000.00 | 
            
            
            | Total funds | 
              £85,721,000.00 | 
              £93,614,000.00 | 
              £101,140,000.00 | 
              £106,985,000.00 | 
              £107,601,000.00 | 
            
            
            | Employees | 
              242 | 
              261 | 
              269 | 
              269 | 
              269 | 
            
            
            | Volunteers | 
              61217 | 
              61000 | 
               | 
               | 
               | 
            
            
            | Consolidated accounts | 
              true | 
              true | 
              true | 
              true | 
              true | 
            
            
            | Charity only accounts | 
               | 
               | 
               | 
               | 
               | 
            
            
            | Financial year start | 
              2007-01-01 | 
              2008-01-01 | 
              2009-01-01 | 
              2010-01-01 | 
              2011-01-01 |