Scott, 62, became a carer for the EastEnders actress in 2014 when she fell ill with the disease and the pair were married for 20 years before her death in 2020.
The actor's agent, 62, went public with their relationship last year, having grown close while campaigning together for dementia awareness following Barbara's diagnosis with Alzheimer's.
Sandra, best known for her cheeky turn in Carry On Camping alongside close friend Barbara Windsor, passed away from natural causes in Los Angeles after six weeks in hospital.
Dame Barbara Windsor's widower Scott Mitchell has shared he 'still wakes up in panic' worrying about the late star, like he did when she was still alive.