On Friday, 31 January 2020 14:58:35 UTC, Gareth Evans wrote:
I'm fairly sure that when this house was rewired that the cable
from the consumer unit to the cooker point was 6mm, but
recent discussion here has discussed 10mm and even 16mm.
Has the standard changed over the years?

6mm is normal but it does depend on cable routing. Perhaps newer homes have more likelihood the cable is running in insulation.

4mm is the minimum cable size for a 32A radial :-)

Owain