Charlie Pridham wrote:

is there any gizzmo that can be introduced between the
plug and the printer that would if the power is interrupted stay off
until I switch it back on? and if so what an earth is it called!!?

An NVR switch, usually used on workshop power tools

e.g https://www.axminster.co.uk/kedu-nvr-switch-230v-1ph-e-stop-200093