Just in case anyone is having the same problems I've had trying to get a new blank key cut (Sorry mate we will only cut blanks WE provide)

I found a cutter that will do it, and made a perfect job - 3 St Owen Street Bowens Shoe Repairs

Blank was about £4 from eBay and pretty much identical to original, needed a new one as mine was a bit grubby

May come in handy if anyone else is looking to do the same