Wire colours help...

[Laurayale]

I’m changing a outside light for a ring floodlight, when I’ve taken the existing light off it reveals a brown, yellow and blue wire. I’m assuming the brown is live, blue neutral and yellow earth?? Just confused as I expected a yellow and green for earth??? Can anyone advise??? Thanks

 

[westward10]

Moved from DIY forum.

 

[littlespark]

Can only ask what the yellow was being used as before?
Certainly sounds strange as the green/yellow should have a minimum ratio between the two colours

 

[DPG]

How were the wires connected to the light originally?

 

[James]

a picture would help.

could it be red, yellow and blue,
with brown tape or sleeve over the red cable?

 

[Baddegg]

Are you sure they’ve used that core as the Earth? As above pics help no end, strip back a bit of outer sleeve and see if the cpc has been cut back...