LONDON (AP) — British Prime Minister David Cameron is expected to reject calls for a shift in economic policy and vow to maintain a course of austerity despite calls for more stimulus and an embarrassing ratings-agency downgrade.

In a key speech on the economy Thursday, Cameron will argue that the U.K. is beginning to see signs of progress thanks to his government’s tough economic policy and that changing its approach risks plunging Britain “back into the abyss.”