Veronicas-is it possible to move them? They are taller than I realised

Give them a good soaking and have a hole ready for them. Then keep them well watered for a few weeks, should be fine.

yes as wagger says. you may also have to give them some support too. expect a little bit of wilting until its roots regrow their fine root hairs used for water uptake.
welcome to GoY too.

You could divide them in early spring. Each division will soon grow as big as the parent, then you'll have lots!