With a bit more detail:
Some trades are national for recruitment, others are specific to region (As in a certain number is allocated to each geographic region, etc) - You'd need to speak with the recruiters in order to find out the specifics of how the breakdown works for your respective trade.
That being said, Recruiting has factored in how many applicants come from each area when they make their allocations (as well as other factors), so "gaming" the system or looking for an easier way in isn't going to put the odds in your favour.