Bathroom Fitters.

You should also look to recommended bathroom fitter who is local to you. Good bathroom fitters are hard to find and how much you are willing to spend is another variable.

It is important that you check out bathroom fitters and installers on such websites as Checkatrade.com or mybuilder.com. It is better to rely on customer recommendations then relying on neighbours trying to do a favour, or attempting to do the job yourself. 
The good thing about using these sites is that you can rest assured that the bathroom fitters are vetted and constantly monitored, many having years of experience. Any problems with specific fitters would be easily spotted.

It is useful to know how long it takes a fitter to do a specific job. The simplest job to give a bathroom fitters http://sigmaconstruction.uk/box-bathroom-fitters-and-designers-.html is to replace a new pedestal basin. If you have the right fitter this will take less than 2 hours. The largest job in a bathroom is tiling, which may take almost a week. It is in your interest to make sure that jobs do not take longer than they should, after all you are the one who will be paying for it. 
In reality, a fitter will be doing a number of jobs in the bathroom such as fitting baths, toilets and sinks, tiling, installing taps, and installing underfloor heating. The more tasks the needed the greater the price. 

If you have a problem with your fitter you can always complain to the Kitchen Bathroom Bedroom Specialists Association (KBBSA). This is a trade association which sets the standards so it is their interest to make sure that any home specialist works to the highest grade. Certainly it is never worth cutting corners; well designed bathrooms must be fitted by quality service people. It all comes down to peace of mind.