[P1–298]: RESEARCHING DEMENTIA‐RELATED SLEEP PROBLEMS USING ACTI‐WATCHES: PRELIMINARY INSIGHTS FROM THE DREAMS START STUDY. (1st July 2017) - Hallam, Brendan; Kinnunen, Kirsi M.; Webster, Lucy A.; Rapaport, Penny; Cooper, Claudia; Barber, Julie; Horsley, Rossana; Pickett, James; Kyle, Simon D.; Espie, Colin A.; Livingston, Gill