london leader britain main opposition labour party jeremy corbyn politicians could lose seat proposals cut cost politics go ahead report suggest tuesday former prime minister david cameron govern conservative party pledge reduce number lawmakers 650 600 make cost save criticism expense claim make work parliament independent boundary commission make proposals make sure electoral district england scotland wales northern ireland roughly equal number voters mean certain seat like corbyn set abolish clear whether parliament back plan due take effect 2022. since lose conservatives parliamentary majority election june prime minister theresa may dependent support small northern irish party democratic unionist party oppose change early vote labour also say would vote measure accuse conservatives use review pursue political advantage daily telegraph newspaper say change place june election may conservatives would majority labour leader uk lawmakers could lose seat cost cut plan