The Architectural profession is regulated by
The Architects Registration Board
8 Weymouth Street
London
W1W 5BU
+44 (0) 20 7580 5861
You do not have to be an Architect to design buildings or building works; but you can only describe yourself as an Architect in the UK if you have qualified professionally and are registered with the Architects Registration Board. Architectural Consultants are NOT Architects - though they may be perfectly competent.