The Greater Washington Board of Trade took to the sky yesterday to broadcast its message about the advantages of conducting business in the Washington area.

Linked by two satellites to British business representatives meeting in London, a Board of Trade panel held an hour-long video teleconference to discuss and demonstrate the local opportunities for advanced technology firms.

"We'd like to see you bring your business to Washington," board President John T. Hazel Jr. told more than 50 British viewers gathered at the Intercontinental Hotel in London. Hazel moderated the program of taped and live presentations broadcast from the McLean headquarters of Satellite Business Systems and attended by about 80 representatives of local businesses.

"We want to give British executives some idea of what Washington can do for them," Hazel said on behalf of the board, a regional organization representing more than 1,400 businesses.

The presentation was particularly aimed at high-tech companies, which a board spokeswoman defined as including firms involved in telecommunications, advanced computer systems, software development and weapons systems.

Among the strengths extolled were the D.C. area's highly educated labor pool, its numerous educational and research facilities and its transportation links to the South and Northeast.

Almost 33 percent of Washington-area adults over 25 are college graduates, the highest proportion of any major metropolitan area, according to the 1980 census. The Baltimore-Washington area also had more than 107,000 scientists and engineers in 1980, more than any other area, and has the highest proportion of such workers -- 204 per 10,000 residents, the Board of Trade said.

The Baltimore-Washington region's 5.6 million people also have a median income of $21,500 -- the highest of the nation's major metropolitan areas, according to Census figures. The executives were quick to point that out to their overseas counterparts, too.