On Monday, September 2, the British Pound depreciated 105 pips or 0.86% against the US Dollar. Note, that the Pound also depreciated against other major currencies.
The reason for the drop is the news that the British opposition lawmakers are planning to propose legislation to oblige the UK Government to suspend Brexit.
The UK Prime Minister Boris Johnson claimed that he would purge any member of the UK Parliament who would vote against the Government on Brexit.