I know this may sound like banging our own drum but if you can find a good local independant supplier you would be well advised to do so. You may
pay a little more, but they will be more likely to be able to advise you correctly and help or even carry out the installation and fully test the machine for you.
If you give your exact location then someone may be able to point you in the right direction. London is a big place.
That which can be asserted without evidence, can be dismissed without evidence.