An open letter to Simon Stevens, NHS chief executive, and Alistair Burns, national clinical lead for dementia by Brunet, M, Murphy, K, Britton, B, Chand, K, Marciano, S, Greenhalgh, T, Buckman, L, Phillips, G, Lehman, R, Ballard, T, Green, A, Gordon, P, Wilson, S, Nicholl, D, Pollard, M, Treadwell, J, Poole, S, Reeve, J, Roseveare, C, Wookey, S, Malhotra, A, Wilcock, J, Ward, A, Evans, C, Larcombe, J