Youse is also Irish and Glaswegian, so Morven Christie owuld be familiar with it!
I do know someone from Morecambe. She doesn't sound that dissimilar to some of the actors (those that are really from the vague area). If you are North Lancs, who do you think sounds most authentic, out of curiosity?
Does Morecambe not get any generic estuary accent/ overspill effect?
At least most of the actors are at least fairly local (ish) to the area. I can't remember what I was watching recently where the accents were beyond awful. Probably something elses set in 'the North' since everyone in TV land does seem to think that is one generic accent. But it could have been 'East Anglia' aka 'The West Country'... actually, it was more than likely Broadchurch.