the ever useful NHS Direct has this to say on the subject - 'Your Social Services Department will have criteria for the services it provides. They can offer advice and information or arrange an assessment of your or your carers needs at home. Social services will normally have a charging policy for home care and residential care services. Costs will usually depend on your benefits, savings, or income.
Under the Chronically Sick and Disabled Persons Act 1970, the Local Authority has a duty to provide welfare services that include the provision of a holiday for people with disabilities.
Your Social Services department may also be able to put you in touch with voluntary organisations that may also be able to offer respite care services.
Some voluntary organisations for specific health conditions have their own holiday homes (e.g. Diabetes UK, Multiple Sclerosis Society, Arthritis Care). The charity 'BREAK' can offer respite care, specialist childcare, and UK holidays by the sea.
The charity 3H Fund -Organise subsidised group holidays for physically disabled children and adults with the support of volunteer helpers so that carers can have a break. They also provide grants to families on low income who care for a physically or mentally disabled person to have a UK holiday break.'
I know this isn't really what you wanted, but www.nhsdirect.nhs.uk has an enquires section so I recommend you forward your question to them, hope it all works out all the best, IggyB