The elder statesman has been wheeled out:
The Former Prime Minister John Major is set to issue a thinly veiled attack on Boris Johnson and Michael Gove, warning that Tories leading the campaign to leave the EU risk “morphing into Ukip”.
In a speech on Friday Sir John will say that as the economic arguments in favour of Brexit get demolished so Tory Leave campaigners have increasingly returned to the theme of immigration.
This, he will say, is straying into “dangerous territory” and risks “opening up long-term divisions in our society”.
Previously: John Major warns