According to a YouGov survey released on Thursday, Britain’s opposition Labour party has a 33-point lead over the ruling Conservatives, following days of turmoil in financial markets caused by the government’s proposed tax cuts.

According to YouGov, the lead was a record high percentage for Labour in any YouGov poll and the highest proportion the party has ever registered in any published survey since the late 1990s.

Earlier on Thursday, British Prime Minister Liz Truss defended her contentious proposal to re-ignite economic development after massive tax cuts announced last week damaged the pound and government bond prices.

Labour received 54% of the vote in a YouGov survey conducted on Wednesday and Thursday, while the Conservatives received 21%. It was a poll of over 1,712 British people.

Another YouGov survey released earlier this week found that 45% of people supported Labour, while 28% supported the Conservatives.

Three other polls on Thursday also showed large leads for Labour – Survation put Labour’s lead over the Conservatives at 21 points; Deltapoll showed Labour 19 points ahead; and Redfield & Wilton Strategies had Labour 17 points ahead.

Truss took office on Sept. 6 after winning the Conservative Party’s leadership contest following Boris Johnson’s resignation as prime minister. The next national election is likely to be held in 2024.

Opposition leader Keir Starmer said during his party’s annual conference this week that it was Labour’s best chance to win power since 2010, following four straight election defeats.