I knew it as the Gatehouse to St Mary’s Abbey.
It was home to a Dr Nosworthy, a large, imposing gentleman whose function for the nuns of the Abbey I never found out.
He was most concerned that if the power went off, then his new, gas fired heating system would stop, unlike his ancient solid fuel device that would keep burning. This was about 1973 or so and power cuts commonplace. I got him a caravan battery and a 12/240volt inverter. He was quite happy as he got enough power to also power a reading light.
Over to you grandarog