Brexit means Brexit
We are where we are and hoping for a second (third?) referendum or saying the first one isn't binding is not helpful.
What we need to do now is turn this into an opportunity and get on with being successful in the world in the way that no EU country is managing to be. The EU, or more probably the Euro, is dragging even a power house nation like Germany into the doldrums. We have to start working on doing better out of the EU than we have been while in - which incidentally isn't bad thanks to holding on to our own central bank, currency and control of interest rates.