Far more people retain left-wing thinking throughout their lives in Britain today because of the lack of opportunity and inequality that now exists for so many.
Even those on regular and reasonable wages/salaries have problems getting on the housing ladder. Insecurity in employment is a further factor, and even such matters as gaining a place at the school of choice for your child play heavily into modern day political thinking.
However, in the above situation(s) not all look to the left for solutions to their problems, for as we have all seen some (a small but growing minority) will turn to the hard right for solutions.
In that, the hard right offer seemingly quick, simple and populist solutions to longstanding complex problems and that can be a significant attraction for those who feel that centre political governments have failed them over a protracted period.