Having taken the time to thoroughly read through the thread. I would personally refuse point blank to give any more payment over.
Pick the parts of the job (worse parts) that you want redone. Give them the chance to redo it. If they refuse, moan about it or leave a mess again. I would go to a solicitor and threat legal action. £1200 for a small bathroom 16 metre is alot of money. There is no reason why it shouldnt be showroom perfect for that money you should struggle to find faults in it!
Was it one company you got to do the whole job or did you subcontract and find tradesman yourself?
Pick the parts of the job (worse parts) that you want redone. Give them the chance to redo it. If they refuse, moan about it or leave a mess again. I would go to a solicitor and threat legal action. £1200 for a small bathroom 16 metre is alot of money. There is no reason why it shouldnt be showroom perfect for that money you should struggle to find faults in it!
Was it one company you got to do the whole job or did you subcontract and find tradesman yourself?