Hi rktb, fancy bumping into you on one of my increasingly rare visits to MN!
I've just been doing dd1's secondary school uniform, so here is the drill: thread cotton into not too thick needle, knot end of thread. Fold over ends of labels, and start in one corner. I generally do bottom rh corner, as am right-handed. Stitch your way round label, with an extra stitch at each corner, as that's where they'll come loose if they're going to. Get back to starting point, do several stitches over the top of each other to secure the whole arrangement, cut thread, (not too short). Bingo.
Btw am increasingly coming round to idea of L school. Went to see nearby RC primary with Islington league-table topping results, beacon status blah blah, and even from my warp-speed 15 minute tour it was obvious that the place is a complete SATS factory. Will just have to abandon the idea of going skiing ever again. Sob.
Do look out for N/E London meetups -- dinosaur was going to organise one sometime soon, and would be good to meet you in person!