Two opinion polls have been published in the past 24 hours, both of which show Labour maintaining a large lead but show contrasting fortunes for the Conservatives and Reform.

A poll by Norstat, carried out online from June 17-19 among 2,059 adults in Britain, puts Labour 20 percentage points ahead of the Tories.

The figures are Labour 40%, Conservative 20%, Reform 19%, Liberal Democrats 12%, Green 5%, SNP 3%, Plaid Cymru 1% and other parties 1%.

A poll by People Polling, carried out online on June 18 among 1,228 adults in Britain, also gives Labour a 20-point lead, but has both parties at much lower levels of support.

The figures are Labour 35%, Reform 24%, Conservative 15%, Lib Dems 12%, Green 8%, SNP 3% and other parties 2%.

A graph showing the latest opinion poll averages for the main political parties
The latest opinion poll averages for the main political parties (PA Graphics)

An average of all polls that were carried out wholly or partly during the seven days to June 20 puts Labour on 41%, 20 points ahead of the Conservatives on 21%, followed by Reform on 16%, the Lib Dems on 11% and the Greens on 5%.

The Lib Dems and Reform are up on the figures for the previous week, while Labour, the Tories and the Greens are down, with the averages for the seven days to June 13 being Labour 42%, Conservatives 22%, Reform 14%, Lib Dems 11% and Greens 6%.

On May 22, the day Rishi Sunak called the General Election, the seven-day averages stood at Labour 45%, Conservatives 23%, Reform 11%, Lib Dems 9% and Greens 6%.

The averages have been calculated by the PA news agency and are based on polls published by BMG, Deltapoll, Find Out Now, Focaldata, Ipsos, JL Partners, More in Common, Norstat, Opinium, People Polling, Redfield Wilton, Savanta, Survation, TechneUK, Verian, WeThink, Whitestone and YouGov.