Police say Alvin Ricketts was "truly brazen", wearing a variety of flamboyant hats and dinner scarves around Soho.
The senior officer leading the operation, Detective Chief Superintendent Kevin Southworth said:
"Alvin Ricketts was one of a group of drug dealers arrested as part of Operation Rense who congregated in Soho. Ricketts was truly brazen in his offending, wearing a variety of quite flamboyant hats, dinner scarves and other outfits that made him stand out.
"The 74-year-old would regularly travel from his sheltered housing accommodation to sell class A drugs in the heart of the West End."
More top news
Hundreds of passengers were ordered to leave the terminal building and flights grounded after passengers suffered difficulties breathing.
Council leaders today called on the government to provide extra money to help resettle the youngsters in the capital.
An eyewitness said: "It was very unnerving. It was just after 12pm and there were suddenly police vans and cars everywhere."