Anecdotally, it's been welcomed here and there was some disquiet that 16 and 17-year-olds couldn't vote in the Brexit referendum earlier this year in June. There was a very specific debate in the House of Commons and the House of Lords about that. I'm sure it would be of interest to you to read those debates. At the end of the day, it was decided that they wouldn't have a vote, although the Lords did suggest that it was a good idea. There is now a bit of confusion, in that 16 and 17-year-olds up here have the vote for some elections but not for some others, and I don't think that is ideal.
On August 31st, 2016. See this statement in context.