It is called a 'Scotland Future' side, effectively a sort of 'B' squad instigated by Bertie Vogts, though Don is of course part of Scotland's present, having played 45 minutes for them two weeks ago against the Republic of Ireland.
Vogts' reasoning in taking Don is that he needs more match practice, and he is likely to play the full game.
It was his request to be involved and of course he has gone with Glenn Roeder's blessing.
As for David, whose parents are both Scottish, he explains: "I have played for the England under-16s, the under-17s, the under-18, and under-20s, but never in a qualifier, so I am not tied to them.
"It is someything I have thought about and I just feel it is a better chance for my career to play for Scotland.
"Glenn knows about it and is okay."