Singapore is at least partly free and was part of the British Empire.
To qualify as an "electoral democracy", a state must have satisfied the following criteria:
1.A competitive, multiparty political system;
2.Universal adult suffrage for all citizens (with exceptions for restrictions that states may legitimately place on citizens as sanctions for criminal offenses);
3.Regularly contested elections conducted in conditions of ballot secrecy, reasonable ballot security, and the absence of massive voter fraud that yields results that are unrepresentative of the public will;
4.Significant public access of major political parties to the electorate through the media and through generally open political campaigning
http://en.wikipedia.org/wiki/Freedom_in_the_World_(report)
Year Under Review Free Partly Free Not Free
2010 89 (46%) 58 (30%) 47 (24%)