Really quite simple. A couple of people decided Gatwick's closure was their opportunity to cash in. They chose central London as one of the few areas where there is readily available private imaging, cardiologists and other specialties.
The actual facilities are nothing special. As for the ambiance, well I leave that to others, but I have seen far better.
My concern is my experience, the eye watering prices and the pressure to charge for everything. My impression is that the number of AMEs in Central London not in this cartel is rapidly diminishing. Time will tell whether the specialists they have tagged onto is as efficient / effective / helpful when needed as Gatwick's bank of experienced specialists.
The opportunity is there for well run centres across the UK providing a fantastic personal service, but to date I fail to see that happening....