There is a background to the pound falling though that is deeper than just Brexit. Its was already at a 7 year low earlier in the week, and was called the most over valued currency earlier in the year by DB.
There is a lot of knee jerking going on as the market usually do, but the general commentary seems to be as if people have never witnessed what markets do or been following them for any period of time. Going to be a while before we can tell how much is just reactionary based on uncertainty.
I am loving the global turmoil caused by a small irrelevant island in the atlantic though.