Specialist Housing topic for my Dissertation

I am trying to compile a list of Architects who specialise in Specialist housing or Housing for the older generation, as I am looking to send questionnaires and conduct interviews with interested parties.
My dissertation is on Vertical living for the over 55s, offering high-rise buildings with multi-use housing to accommodate the rising older population in the UK, especially in London.

I would greatly appreciate your help for my Dissertation, if you could email me at [log in to view email address]