I'm up north too. I don't think I've heard anybody up here say it irl. I don't think it's twee, more like an Essex thing (it's all down 'sarf' to me, so I might be off by miles!)
My exclamations tend to be more blasphemous- Jesus Christ, bloody hell, good God, my God, Oh God and good grief, being the most used. Worse, if I'm talking to a religious person and my brain is telling me not to say them. I'm guaranteed to say them every other sentence.