The GBP/USD has fallen as expectations of a Brexit deal this week are reduced intensively. Boris Johnson was on the wires earlier and the general feel of his comments was, 'don't expect any breakthrough this week'. So, the GBP has been seeing that negative sentiment weigh on it so far this am.
The other opinion shifter for Pound to be aware is the ruling of the Supreme Court due this week. The growing rumor is that the UK Government is set to lose, but then will rapidly seek a prorogation on alternative grounds.
Near term risk for sellers is above the 4hr trend line and expect sellers on a re-test with current sentiment.