According to this chart shared by Bank of America Merrill Lynch (BofAML), vote-counting Friday was most volatile ever for the G-10 currencies.

For many, Friday was a day that many haven't seen a day like Friday, especially the movement in the pound. Friday was most volatile day ever for the pound sterling. On Friday Pound touched above 1.5 in the morning but was down to as low as 1.322 by evening.