| Financial year end | 2007-12-31 | 2008-12-31 | 2009-12-31 | 2010-12-31 | 2011-12-31 | 2012-12-31 | 2013-12-31 | 2014-12-31 | 2015-12-31 | 2016-12-31 | 2017-12-31 | 2018-12-31 | 
            
            | Income from legacies | £522,088.00 | £1,474,737.00 | £1,693,611.00 | £940,346.00 | £1,181,870.00 | £1,455,146.00 | £2,494,200.00 | £2,536,111.00 | £2,275,517.00 | £1,087,747.00 | £2,203,516.00 | £2,242,991.00 | 
            
            | Income from endowments | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Voluntary income | £2,901,247.00 | £3,939,597.00 | £3,990,477.00 | £3,272,898.00 | £4,257,033.00 | £3,492,960.00 | £4,735,619.00 | £4,919,514.00 | £4,780,787.00 | £3,973,720.00 | £4,688,409.00 | £4,665,134.00 | 
            
            | Activities generating funds | £1,305,406.00 | £1,449,686.00 | £1,588,228.00 | £1,679,376.00 | £1,902,403.00 | £2,024,869.00 | £1,756,308.00 | £1,883,177.00 | £2,091,378.00 | £2,829,468.00 | £3,133,655.00 | £3,469,943.00 | 
            
            | Income from charitable activities | £647,668.00 | £482,841.00 | £1,021,855.00 | £748,409.00 | £0.00 | £879,402.00 | £1,006,006.00 | £763,836.00 | £819,274.00 | £845,249.00 | £841,306.00 | £845,448.00 | 
            
            | Investment income | £137,499.00 | £180,389.00 | £88,998.00 | £86,514.00 | £78,126.00 | £73,045.00 | £93,801.00 | £105,090.00 | £120,056.00 | £91,368.00 | £76,759.00 | £72,427.00 | 
            
            | Other income | £0.00 | £3,000.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £43,858.00 | £28,426.00 | 
            
            | Total income | £4,991,820.00 | £6,055,513.00 | £6,689,558.00 | £5,787,197.00 | £6,237,562.00 | £6,470,276.00 | £7,591,734.00 | £7,671,617.00 | £7,811,495.00 | £7,739,805.00 | £8,783,987.00 | £9,081,378.00 | 
            
            | Investment gains | £-84,542.00 | £-14,698.00 | £37,770.00 | £64,957.00 | £2,266.00 | £77,661.00 | £126,454.00 | £90,824.00 | £-15,916.00 | £301,012.00 | £186,581.00 | £-149,780.00 | 
            
            | Gains from asset revaluations | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £-56,399.00 | £0.00 | £-155,536.00 | £0.00 | £0.00 | £0.00 | 
            
            | Gains on pension fund | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Voluntary income costs | £584,854.00 | £552,345.00 | £625,294.00 | £682,607.00 | £707,480.00 | £725,946.00 | £735,151.00 | £870,905.00 | £869,862.00 |  |  |  | 
            
            | Fundraising trading costs | £973,693.00 | £1,106,042.00 | £1,174,359.00 | £1,289,201.00 | £1,273,118.00 | £1,322,502.00 | £1,433,497.00 | £1,592,005.00 | £1,772,317.00 |  |  |  | 
            
            | Investment management costs | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £22,743.00 | £23,822.00 | £26,281.00 | 
            
            | Grants to institutions | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Charitable activities costs | £3,219,126.00 | £3,482,721.00 | £3,804,050.00 | £3,991,788.00 | £4,296,492.00 | £4,392,614.00 | £4,731,416.00 | £5,038,893.00 | £5,240,814.00 | £5,615,295.00 | £5,548,801.00 | £5,545,460.00 | 
            
            | Governance costs | £40,343.00 | £40,670.00 | £46,979.00 | £42,891.00 | £49,152.00 | £39,230.00 | £45,153.00 | £51,164.00 | £57,005.00 | £36,254.00 | £19,274.00 | £16,670.00 | 
            
            | Other expenses | £0.00 | £234.00 | £0.00 | £0.00 | £12.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Total expenses | £4,818,016.00 | £5,182,012.00 | £5,650,682.00 | £6,006,487.00 | £6,326,254.00 | £6,480,292.00 | £6,945,217.00 | £7,552,967.00 | £7,939,998.00 | £9,110,580.00 | £8,774,373.00 | £8,761,007.00 | 
            
            | Support costs | £0.00 | £382,153.00 | £391,184.00 | £384,398.00 | £414,604.00 | £341,666.00 | £371,561.00 | £427,907.00 | £444,604.00 | £580,763.00 | £660,569.00 | £656,821.00 | 
            
            | Depreciation | £247,388.00 | £308,628.00 | £331,955.00 | £346,461.00 | £384,914.00 | £370,739.00 | £326,611.00 | £317,092.00 | £396,002.00 | £393,681.00 | £366,497.00 | £341,959.00 | 
            
            | Reserves | £5,090,314.00 | £5,878,043.00 | £6,757,300.00 | £5,771,964.00 | £5,064,820.00 | £5,016,531.00 | £5,913,939.00 | £6,109,060.00 | £6,012,712.00 | £5,263,438.00 | £5,668,091.00 | £6,000,000.00 | 
            
            | Fixed assets at start of year | £7,419,372.00 | £7,674,658.00 | £9,698,324.00 | £10,919,056.00 | £9,401,796.00 | £10,315,828.00 | £10,709,523.00 | £11,043,674.00 | £11,013,131.00 | £11,248,683.00 | £9,395,214.00 |  | 
            
            | Fixed assets at end of year | £7,674,658.00 | £9,698,324.00 | £10,919,056.00 | £9,401,796.00 | £10,315,828.00 | £10,709,524.00 | £11,043,674.00 | £11,013,131.00 | £11,248,683.00 | £9,395,214.00 | £9,126,285.00 | £8,817,334.00 | 
            
            | Fixed investment assets at start of year | £2,954,336.00 | £3,282,919.00 | £5,235,511.00 | £6,258,854.00 | £3,910,591.00 | £4,199,522.00 | £4,477,181.00 | £4,935,772.00 | £4,891,288.00 | £5,326,182.00 | £3,793,202.00 |  | 
            
            | Fixed investment assets at end of year | £3,282,919.00 | £5,235,511.00 | £6,258,854.00 | £3,910,591.00 | £4,199,522.00 | £4,477,183.00 | £4,935,772.00 | £4,891,288.00 | £5,326,182.00 | £3,793,202.00 | £3,732,725.00 | £3,631,090.00 | 
            
            | Current investment assets | £0.00 | £0.00 | £0.00 | £0.00 | £355,118.00 | £142,139.00 | £0.00 | £19,714.00 | £29,257.00 | £0.00 | £0.00 | £0.00 | 
            
            | Cash | £1,822,786.00 | £656,433.00 | £464,443.00 | £1,969,501.00 | £761,676.00 | £703,297.00 | £1,146,960.00 | £991,209.00 | £554,855.00 | £1,805,463.00 | £1,100,902.00 | £1,826,631.00 | 
            
            | Total current assets | £1,919,029.00 | £770,479.00 | £572,630.00 | £2,115,272.00 | £1,116,794.00 | £845,436.00 | £1,252,293.00 | £1,594,359.00 | £1,163,903.00 | £1,963,053.00 | £2,418,254.00 | £3,039,089.00 | 
            
            | Creditors within 1 year | £111,634.00 | £127,947.00 | £74,184.00 | £253,899.00 | £251,496.00 | £306,088.00 | £274,126.00 | £376,587.00 | £477,373.00 | £492,817.00 | £482,888.00 | £624,181.00 | 
            
            | Long term creditors or provisions | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Pension assets | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Total assets | £9,482,053.00 | £10,340,856.00 | £11,417,502.00 | £11,263,169.00 | £11,181,126.00 | £11,248,872.00 | £12,021,841.00 | £12,230,903.00 | £11,935,213.00 | £10,865,450.00 | £11,061,651.00 |  | 
            
            | Endowment funds | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | 
            
            | Restricted funds | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £0.00 | £4,603,202.00 | 
            
            | Unrestricted funds | £9,482,053.00 | £10,340,856.00 | £11,417,502.00 | £11,263,169.00 | £11,181,126.00 | £11,248,872.00 | £12,021,841.00 | £12,230,903.00 | £11,935,213.00 | £10,865,450.00 | £11,061,651.00 | £6,629,040.00 | 
            
            | Total funds | £9,482,053.00 | £10,340,856.00 | £11,417,502.00 | £11,263,169.00 | £11,181,126.00 | £11,248,872.00 | £12,021,841.00 | £12,230,903.00 | £11,935,213.00 | £10,865,450.00 | £11,061,651.00 | £11,232,242.00 | 
            
            | Employees | 145 | 147 | 157 | 161 | 164 | 191 | 198 | 204 | 231 | 243 | 252 | 250 | 
            
            | Volunteers | 500 | 500 |  | 550 | 575 | 599 | 623 | 650 | 670 | 620 | 658 | 634 | 
            
            | Consolidated accounts | true | true | true | true | true | true | true | true | false | false | false | false | 
            
            | Charity only accounts |  |  |  |  |  |  |  |  |  |  |  |  | 
            
            | Financial year start | 2007-01-01 | 2008-01-01 | 2009-01-01 | 2010-01-01 | 2011-01-01 | 2012-01-01 | 2013-01-01 | 2014-01-01 | 2015-01-01 | 2016-01-01 | 2017-01-01 | 2018-01-01 |