All this talk about van der Merwe not being Scottish is stupid considering the Vunipola brothers represented England and the Lions.Articles for example. The teelgprah have one today full of Scottish fans saying they have been turned off because of and hoping Graham beats van der Merwe's record because then it be held by someone properly Scottish.
The game has changed to allow Unions these opportunities.
Fin Smith has Scottish parents, had a grandfather who played for Scotland, but no problem about him representing England and good luck to him I say.