 Thomson GRC was led by Leong Horn Kee and Wong Kan Seng.The ward only exist for one term until 1997.Bishan and Thomson, along with Toa Payoh GRC, was merged to create Bishan–Toa Payoh GRC, while Serangoon Gardens was absorbed into three constituencies, namely Aljunied GRC, Ang Mo Kio GRC and Marine Parade GRC.