On Sunday, 30 August 2020 14:38:47 UTC+1, S Viemeister wrote:
That's built-in ovens. Baby Bellings are usually plugged into a 13A outlet
When we bought this house, the Rayburn was supplemented by a hard-wired
Baby Belling. It now has a plug on it (for occasional emergency use),
and a proper, dual-fuel cooker has been installed.

Baby Bellings came in two versions, one for a plug and one for hard-wiring. The plug version had an interlock between one of the rings and the oven to restrict the tital lload.

Owain