"Pratty" is E Lancs as well as W Yorks pronunciation of "Pretty", so you could argue that whether the title of the Holmfirth Anthem is "Pretty Flowers" or "Pratty Flowers" is academic, since anyone singing it in the correct accent will pronounce it "Pratty" anyway.

It raises again the question as to whether people should attempt to sing songs in a local accent/dialect unless they were born into it, which was discussed in another thread not long ago.