Hi folks. I'm new to this d.i.y business and am just needing some advice. I'm going to change a light in the bathroom but on inspection there are 4 wires in the existing rose ( 2 grey wires, a red and an earth) but only enough terminals for 3 in the new light.
What do I do? Heeeeelp

What country are you from? Each country has different color codes. I suspect the red is hot, the grey is neutral, and or course earth is ground. The two greys should be able to connect together under one terminal.