ΔE 8.5, close: similar, with a visible difference side by side. Green Yellow is a little darker than British Light Mud.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Green Yellow is a little darker than British Light Mud.
The same difference applies the other way round: British Light Mud is a little lighter.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See British Light Mud on the colour wheel See Green Yellow on the colour wheel
All matches: British Light Mud equivalents · Green Yellow equivalents