ΔE 21.5, loose: different enough that you should pick on purpose. UK Light Stone is noticeably lighter, more muted, warmer than Yellow Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). UK Light Stone is noticeably lighter, more muted, warmer than Yellow Green.
The same difference applies the other way round: Yellow Green is noticeably darker, more saturated, cooler.
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 Yellow Green on the colour wheel See UK Light Stone on the colour wheel
All matches: Yellow Green equivalents · UK Light Stone equivalents