It is worthwhile to set up in the UK because frankly, the UK is ripe for the picking.
H'mmm. I wonder.

Now we're all looking forward to hearing how you got on in one, two ... five years time!
Quite a few others have tried, after all. But as long as you have plenty of capital to invest (risk), perhaps you'll be able to surprise us all. The "market" could certainly do with some stiff competition, and I'm sure we all wish you Good Luck.
Meanwhile, my advice would be that you consider fostering a relationship with one of the existing medical equipment servicing and repair companies.
And further to that ... if your principals (backers, whomever) have money to spare, perhaps you should simply consider
buying one of those companies - thereby gaining an immediate foot in the door, toehold in the market, instant client base, ready-to-run engineers (with local knowledge
etc., etc.) ... and such good things as that!
