Only one comes close.
Arrse's favourite MP Diane Abbot, with 49.69% of
eligible voters in her constituency. Turnout was 66.2%
Or 75.1% of Turnout and a majority 35,139
Quite patently not true in Hackney North & Stoke Newington with it's 66.2% turnout. And probably not true of a good few other constituencies too.
Perhaps we should only allow MPs from those constituencies that turn out 50% +1 of the registered electors to enter parliament or form governments? If the buggers don't make the effort to take part, then sod 'em. Could cut the wages and expenses bill if the HoC had only 100 or so members!
Source:
Rt Hon Diane Abbott MP