Looking good Fred.

Good approach to stocking too, to allow time for the water to become 'balanced'.

I'd quarantine any new stock too, preferably in a glass-sided aquarium so you can get a good look. Treat for parasites like white spot etc while isolated in a small quantity of water...much cheaper than trying to treat a whole pond further down the line.

Likewise with plants (bath of Potassium Permanganate, or even just strong salt solution for a few minutes if nothing else to hand).

You get more pathogens coming in on plants and snails than anything else.