Hi,
Many thanks for your help. I will try contacting Bradshaws.
By the way, I was wrong about the size – it’s 20mm square, not 8. Sorry about that.
No hope, I suppose that 20mm might be a standard size with some companies, so I might be able to buy a button somewhere and fit it into the space?
The current button is worn through but was very flexible.
Alas the kitchen was built around the hod/worktop, so cannot get underneath it without a huge amount of difficulty.
Anyway, many thanks again – I appreciate it.