Billy Thomson was before my time unfortunately but I've heard plenty about him and I did see him as an opponent of St. Mirren a few times. I didn't know he was from Linwood, which I've just read on the article shared by Balmullo Bud above.
My thoughts are with his family, friends and former teammates. As has been pointed out already, he was still young and him and Frank McGarvey are a loss. Pelé must be forming a great side up above us.
R.I.P.