Yingluck, who will meet Prime Minister David Cameron in Britain next week, recently named a new cabinet that bears more of her own imprint.
Critics point to the elevation of some Thaksin loyalists after the recent expiry of a five-year court ban on their political activities. But her promotion and retention of favored ministers outside the Thaksin camp, including finance minister Kittirat Na-ranong, showed growing assertiveness, according to Thitinan Pongsudhirak, a professor at Chulalongkorn University.