David wrote:

Just having a quick look at this to try and identify circuits from the
colour of the fuses
White-5A
Grey-10A
Blue-15A
Yellow-20A
Red-30A
Green-45A

white, blue, yellow & red are correct for wylex boards

grey & green may be for other brands, or might be hen's teeth

https://www.ebay.co.uk/itm/WYLEX-5-15-20-30-AMP/281558306805