I see no water proofing or any steps to do a proper shower in those pics. Be very careful drywall and green board a big no no! Lay out of the shower wall on angle, looks okay but should of continued the pattern wrapping the walls properly.
I'm sorry I'm just anal on what I do. I do this as I do this for a living
Gav, I just had your brother install some French doors in my house, and I absolutely couldn't be happier with John's work! He's a great guy that provides high quality work at an excellent price.
I'm happy to recommend him to anyone.