Whilst the fall in the pound is certainly concerning, and certainly linked to brexit, the High Frequency Trading algorithms work in very mysterious ways. The fact some operate based on news content and social interaction means they can most definitely not always be acting properly and reflecting the mood in the market.
Tbf, the £ dropped, as fully expected, on the Brexit result. The trend has been steady to downward over the last few months until Mays speech and the outpourings from Merkel and Hollande over this 'hard Brexit'. The £ is being talked down and that is fair enough, it happens. There will no doubt be a change to the £ when terms for our exit emerge, either good or bad, or if the Government can set up any other intended trade deals. I have no problem with the £ at it's current level, exports are going up, employment is going up, share prices are going up. The underlying economy of the Uk is in far better shape than those of our current partners in Europe........