PIP Assessments - Centres & Appointments

I have just been told by ATOS that I am entering another queue after six months - for an assessment appointment.
ATOS would not tell me which PIP assessment centres are nearest to me. They told me just to wait for a system-generated appointment, and then ask for a change if the venue does not suit.

I feel a total lack of control over the process. ATOS said that the DWP guidelines for PIP interviews are so sadistic [for PIP applicants may conceivably be even more fragile than those for ESA], that:
ESA centres cannot be used for PIP assessments; and
a PIP centre is valid as long as it is no more than 90 mins travel time distant [is that bus or train?].

I live in London and ATOS actually mentioned Watford in passing!!

Can anyone advise what I should do now as ATOS has told me just to wait more?

I mean, how do I know that a centre which is suitable has less of a queue, but because everything is system-generated, I may conceivably be given something else which I reject, and even more waiting then beckons.

Is there a way of finding out PIP assessment centres near to me? In light of my concerns do you have any tips on what I should do now? Or is it just a case of waiting?

Many thanks

A