Wild gyrations seen this week for the British pound continued Thursday, with the currency falling anew after a key group of Northern Ireland politicians said they can’t support Prime Minister Boris Johnson’s current Brexit plan.

The pound slid 0.6% to $1.2755, from $1.2828 seen late Wednesday in North America. The pound has gained around 0.8% this week, but with plenty of ups and downs, while the FTSE 100 index has fallen 1%. The index opened with mild losses at 7,162.83.