Branksome Road, Southend on Sea

My grandmother, Emily May Bantick nee Mills, and my mother, Emily Alice May Frost, nee Bantick attended this church and took me with them. My father eventually required me to attend the Prittlewell Church of England. In the 1950s I was part of the Girls Life Brigade. Does anyone know where in Southend on Sea was it held please? In addition was the Southend chapel attended by Romany gyspies. My grandmother was 1/2 gypsy from Kent. Any information would be gratefully received.