Hi Charlotte, I might have an exclusive story for you with local interest. I designed a Newcastle tartan some ago and sell it online (I quickly followed up with a Sunderland tartan to prevent a riot).
I have moved them on from cloth, kilts and accessoriers into fashion and plan to launch the 'Geordie Girl' look soon: tammie, scarf, scrunchie and skirt - knee-length and mini. If you would like to be involved e-mail me at davidmcgill61@yahoo.co.uk and I'll send you details.