Why does the Welsh men's football team take strange poses in prematch photos?

Question

Why are the Welsh players placed in this asymmetric position, during the team photo before their matches?

For example, against Georgia in 2016, where 3 players stand while 8 squat:

and against Austria in 2016:

Answer 1

This has been covered by BBC Sport, with a working assumption that it is a in-joke by the team.

It is noted in the article, there are team photos going back to 2002 which have a "lopsided" nature.