5 Three members left the Labor Party in 1991 for differing reasons to sit as independents—Pam Buchanan (Ashburton) on 1 February 1991 due to anger over Premier Carmen Lawrence's handling of a cabinet reshuffle, Dr Ian Alexander (Perth) on 4 March 1991 due to his views on the WA Inc scandal, and Frank Donovan (Morley) on 9 October 1991 due to Bob Hawke's role in supporting the Gulf War.
7 On 16 May 1991, the Liberal member for Floreat, Andrew Mensaros, resigned due to ill-health (he died 13 days later). After a considerable drama involving the Liberal preselection for the safe seat, Independent candidate Liz Constable won the resulting by-election on 20 July 1991.