In reply to keith-ratcliffe:
It's poorly thought out, ridiculously expensive, detrimental to long-term progress, has no discernible purpose and will make a few people happy for sentimental reasons.
In other words, ringing Big Ben is the perfect way to mark the event. Go for it, I say.
To continue the theme, it's happening at 11 pm not midnight because the EU controls the timetable.