In UK elections at all levels, voter turnout is considerably higher among older voters than it is among those aged under 35. This affects not only the outcome of elections, but also party political platforms, with parties vying to win the support of older voters.
There are various reasons for low turnout by younger people at elections, but the practice of holding elections on a Thursday (i.e. a work day) is one factor.
Another is relatively high mobility among young people. Postal voting is an option, but there is relatively little take up.
Technology which could make it easier for people to vote, including those working full time or studying away from their home constituency, could help to increase participation in elections by young people.