I don't know what the situation is now, but the Islands did have an Atco training scheme in the past and it was quite succesful.
There were recently jobs advertised at Guernsey and Jersey for fully rated Atcos with the inference that they may consider those not fully rated, with training to follow. As far as I can recall there were no positions for "trainee atcos" and I didn't see Alderney mentioned at all.
G-CI, if you are going to apply for a job at any of the airports, good luck to you but get someone to check the application over - put in a CV based on the spelling in your post and it wouldn't get any further than the bin.