Home-made every time, Graham - the base mix is to my own recipe, there is just me and my nephew using it, and it catches everywhere we use it.
It is basically a 50/50 milk protein/birdfood mix, BUT with a far higher level of one of the birdfoods than is normally used, plus 10% of another ingredient/atrractor which is normally (as far as I can make out) used at 25g per.kilo.
And yes, these levels are perfectly safe, as far as these two aprticular ingredients are concerned - it is merely the cost which keeps the levels of these ingredients low in commercially-produced baits.
And no, please don't ask !!
Jonty