Do KLM require a Covid test for passengers flying from Bangkok to London, especially for children?

Hello,

I will soon be flying from Bangkok to London with KLM with my 2 year old son. I know I am now required to a covid test prior to flying as per UK rules, and according to these rules my son does not. My question is, does anyone know whether KLM require passengers to do a Covid test before boarding the flight? Will my son need to do a test? I know some airlines require this but I can’t get clear information from KLM. Thanks!