English Language help

Can anyone doing English Language A-Level help me with this? So we've just finished learning about regional accents and I'm trying to make some revision materials. How much about specific accents (Geordie, Mancunian, Scouse etc) do we need to know? I think the most important bits are probably the attitudes towards the accents and maybe what has influenced the accent (like immigration or invasions things like that). Am I right in thinking the grammar, lexis and pronunciation aren't as important as the things above? Is there anything important I've missed out?

Which board are you doing?

AQA