Well, after reading this thread I suggest Mr A look at the link and consider a light box. He placed his order yesterday and the light box arrived today while he was at home. He's sitting beside it as I write so time will tell how effective it is, but I have confidence it will help me.

However, I had no idea just how bright these things are! I thought they were bright but not that bright. I have a problem going near it as too much light sets migraines off and rely on sunglasses more and more these days and I'm tempted to wear them just to pass by the light. It also shows how gloomy everything else is this time of year...

Anyway, time will tell.... thanks for the tip off, FizzyAngel and all...