Looking to return to CNC milling/turning

Hi I completed a manual milling and turning apprenticeship in 2003 from there I went straight into vechile fitting for the MOD so I haven't touched a machine in 12 years. I'm thinking of returning to CNC milling/turning but obviously I'm very very rusty. Can anyone recomend any courses or training software I can use to get me back in the swing of things? I already possess C&G Part Programming. Or are they any ways to get my foot in the door and become a setter/operator. I'm based in Dorset UK.

Thanks in advance :)!