Yellow duchess nameplates?

[tonetastic]

Hello all . I've been trying to find the answer to this for a while , and i've had a lot of interesting info passed on to me , but i'm still trying to get a definate yes or no as to whether any of the LMS Coronations ever had their nameplates painted yellow.
I have an elderly friend who saw some of these back in the day and maintains that a couple of the class did indeed ( although he never saw any yellow).

Can anyone shed any more light on this subject?

Thanks