This is the churchyard of the long gone St John the Baptist Church, West Dowlish. According to the Victoria County History of Somerset the church had been demolished by 1575 and the rectory was annexed to Dowlish Wake in 1857. Collinson's 1791 History and Antiquities of the County of Somerset noted that the church had been ruined for a century, that the churchyard was overgrown and the font had been moved to Dowlish Wake Church.
Grid Reference: ST 362 130
Graveyard of St John the Baptist, West Dowlish
I did wonder if the occupant of this tomb had escaped!