Never got round to looking into these, visited during the summer, Ramsholt Churchyard. Today seems a good time for this post.
HMS Spartiate was RN establishment based in St Enoch Hotel, Glasgow. it was responsible for the security and safety of the River Clyde. A large number of motor boats were commandeered to form the River Clyde Patrol, crewed largely by local yachtsmen, many operating as volunteers. Chief Stoker Chambers died of illness.
I have not been able to find anything out about Private Stackhouse. The CWGC lists his age as unknown.