In reply to NottsRich:
the euro has strengthened against the pound pretty much consistently from mid November (0.70) to (0.7816) today. Others are correct, the leading currency dictates the reading of the graph. So if EURGBP graph goes up, then euro is strengthening. If GBPUSD graph goes down then USD is strengthening....make sense?
Whilst BREXIT fears will have an effect on sterling pairs, there are many other factors at play (interest rate policy/forward guidance/manufacturing data) and that relates to both currencies, not just sterling.
INterestingly, whilst searching for headlines for their narratives yesterday all the papers played on the sterling intra day fall (happens all the time) and didn't point out that the FTSE was up.