Anthony Blunt, the distinguished art historian and former curator to the queen who was revealed last week to have been a Soviet spy, will emerge from seclusion tomorrow to discuss the scandal that has shaken Britian.

The announcement by Blunt's attorney, Michael Rubinstein, came after Prime Minister Maragret Thatcher scheduled for Wednesday an extraordinary all-day parliamentary debate on the case. Three former prime ministers, Edward Heath, Harold Wilson and James Callaghan are expected to be among the other speakers.

Blunt 72, was stripped of his knighthood after last Thursday's revelation in Parliament of his wartime spying for the Soviet Union. Today he was threatened with loss of his academic honors at Cambridge University, and he was said by friends to be anxious to tell his side of the story.

Blunt, whose case has provoked calls for a sweeping inquiry into the workings of Britian's government, intelligence agencies and secrecy laws, has been in seclusion and relaying messages to the media through Rubinstein and a friend in London.

Over the weekend Blunt had said through Rubinstein: "Of course, I intend to stay in England, and as soon as present uncertainties are resolved, I look forward to resuming my work as an art historian."

Both his press conference tomorrow and the parliamentary debate Wednesday will be watched closely for answers to a growing list of questions:

Why was Blunt given immunity from prosectuion and allowed to remain in personal service to the queen after confessing to treason in 1964?

Was the queen informed of the secret deal? There have been reports that she was informed when Blunt confessed, but other sources say she first learned of his treason from Thatcher last week and reacted angrily.

Why was no prime minister told until Thatcher was informed this summer, even though Blunt's case was routinely reviewed by civil servants with every change of government?

Is this penchant for secrecy among the elite of the British bureaucracy hiding anymore "moles" or secret agents in government

Will Thatcher and Parliament kill or amend pending legislation -- written by the bureaucracy -- to strengthen Britian's already restrictive secrecy laws?

While controversy swirled around his case Blunt has been staying with friends "somewhere he can go for quiet walks" in the British country-side, according to his close friend, Brian Sewell, a 48-year-old London art dealer.

Some acquaintances and academic colleagues have come to Blunt's defense, arguing that he should be allowed to live out life undisturbed, but Sir Alan Hodskin, Master of Trinity College at Cambridge University, where Blunt studied and taught, said today that Blunt may be stripped of his honorary fellowship there, an honor he shares with Prince Philip, husband of the Queen, and other luminaries. It would be first such action since the college was founded by King Henry VIII in 1546.