This is actually so poor on northern's part, they've missed a real trick. I'm from the theatre industry and I've worked with an abundance of wonderful newly graduated actors who have their own professional voice recording setups and are self represented. They all struggle to find work doing voiceovers and other things because people with more experience are always picked. It would be such a good idea to get people like that involved with the creation of the announcements. Not only because they will most likely have a northern accent of some description making the announcements more authentic but they will be able to properly launch their careers and use it as an example of work that they've done so they can continue to get more voice over work etc. I think that would also look good for northern as it shows that they are giving back to the community. It is honestly a real shame how hard it is to get an acting job especially hearing the stories of the people I've worked with and something like this could be a life changing opportunity that they need.