Hi :) Does anyone know if childminders are allowed to take minded children out in bike seats on the back of an adult bike? With a helmet of course as well as permission from parents?

There is no rule to say not to. Check your insurance though. I did offer this as an option once (optional permission) but no parents took it up (too nervous about other road users, cars knocking off cyclists etc) and now I have more than one LO at a time it is not possible anyway.