Thoughts to think about on the day after St. George’s Day

If this (the cross of St. George) represents England (and it does):

...and this (the cross of St. Patrick) represents Northern Ireland (and it does):

...and this (the cross of St. Andrew) represents Scotland (and it does):

...and this (the flag of St. David) represents Wales (and it does):

...then why does the British flag:

contain no yellow or black?

What are the Welsh? Chopped liver?

Inquiring minds want to know.