In the 1990s, the Lib Dems won a string of byelections at the expense of struggling Conservative governments. Christchurch, Ribble Valley and Eastbourne went straight back to the Tories at the next general election, but the Lib Dems held their later byelection gains - Eastleigh, Newbury and Romsey - in at least two subsequent general elections.
1990s back byelection
