There's been a drop, but it's smaller than the drop in the gap in the six months from the start of December. Everything needs to be viewed in context.
(, Mon 27 Jun 2016, 14:15, Reply)
that coincides with the referendum announcement, followed by the equivalent 6 months of the same downward trend in a day.
Nothing to see here.
(, Mon 27 Jun 2016, 18:19, Reply)