During Thursday, October 17, the British Pound appreciated 192 pips or 1.50% against the US Dollar. Note that the British Pound appreciated against other major currencies as well.
The surge was triggered by a news the UK reached an agreement with the European Union leaders on Brexit. The EU Chief Negotiator Michel Barnier said that the deal could be ratified by the end of October.
However, the Democratic Unionist Party claimed it still would not support the deal. Moreover, the Labour Party leader Jeremy Corbyn suggested that Boris Johnson's deal was more harmful than the one offered by Theresa May.