Former Defense Secretary Michael Heseltine formally forwarded his name Thursday to challenge Prime Minister Margaret Thatcher's role as leader of the Conservative Party. Both camps began an intensive five-day campaign to woo support from members.

Heseltine targeted his uphill effort to take Thatcher's Downing Street office in next Tuesday's vote by appealing to Conservatives' concerns about their re-election prospects in elections that must be called by mid-1991.Heseltine announced his challenge Wednesday, saying a main aim was to resolve a division within Britain's governing party over Thatcher's resistance to plans by the other 11 nations of the European Community to unify markets and nations.

The challenger emerged from his home Thursday to face a crowd of reporters for his first full day of campaigning and said only that he appreciates the support of his colleagues.

Heseltine's name was later forwarded to the Conservative Party by two colleagues - Neil MacFarlane and Peter Tapsell - to meet a noon deadline for challenges.