All I can say is WTF -- There is no way he is a Professional Painter and Decorator, I have never heard off uni bond plaster primer, normally just mist coat new plaster with water down emulsion, why did he put 2 coats of primer on, you should mist coat the walls, check for any filling and apply 2 top coats of your chosen coloured emulsion.
And as for the cutting in around the ceiling, its disgraceful, my you boy could do better. The best thing your friend could do is definitely not pay him any money and kick him as far down the road as possible.
Its these so called Painters and Decorators that are given my trade I have been in for 33 years a bad name.
All I can say absolutely shocking work and definitely doesn't know what he is doing.