Ask HN: How should I connect with the London start-up scene?

I'm a Toronto-based entrepreneur and today, I was supposed to be leaving London, England, for a short vacation. Originally, I planned to stop here for a few days to see family.

Unfortunately, due to weather conditions, my flight has been postponed until Saturday morning.

But, in every disappointment, there's an opportunity.

In this situation, I'd love to connect with the London start-up scene. I'm not sure how to do it, but I'm hoping the HN community might be able to help.

Any suggestions?