In the UK, forty-four Members of Parliament voted against the Act, including 24 Tory and 16 Labour MP's, citing concerns over Canada's past mistreatment of Quebec and Aboriginal peoples (as recalled with frustration by Jean Chrétien in his memoirs Straight from the Heart); overall there was little opposition from the British government to passing the Act.[citation needed] However, new research into documents of the Thatcher government indicate that Britain had serious concerns about the inclusion of the Canadian Charter of Rights and Freedoms within the Canada Act. Part of this concern stemmed from letters of protest the British received about it from provincial actors, but also because the Charter undermined the principle of parliamentary supremacy, which until that time had always been a core feature of every government practising the Westminster system.[11]