Theyre looking great Fyfe mate
But whatever you do dont pot up now!!
Theyre fine for now in them pots, its standard UK and European weed growing, even standard gardening practice to start small and pot up in stages, this builds a far more efficient rootball, ya cant argue with the good old late Percy Thrower.
If you go in a big pot too early, the roots will just go straight to the sides and the bottom of the pot and become rootbound in big pots in no time without making full use of the pot size, and youl be like WTF when you get serious yellowing in mid flower.........trust me ive been there.
Wait till you got some roots at the pots drainage holes before you pot up, this will mean the pot is full of roots, and because theyre LR x's id go into the final potsize next with no more transplants.
If you pot up before the pot is full of roots, the compost will just fall apart and crumble in your hands when removed from the pot, more than likely snapping a few delicate young crucial roots in the process, when the pot is full of roots, you can take the rootball and compost out complete in one clean sweep.
Leave them be in those pots for now ma man