Jeremy Corbyn is launching a desperate bid to resolve the bitter anti-Semitism row that has wiped out six weeks of summer campaigning by his party.

At a crucial meeting of Labour’s ruling body, the national executive committee (NEC), the Labour leader is hoping to reach a deal on a definition of anti-Semitism.

The executive is expected to adopt an internationally recognised definition drawn up by the International Holocaust Remembrance Alliance (IHRA).

But in a move that will dismay Jewish groups and anger many Labour MPs, the executive is also expected to include a so-called free speech clause, allowing criticism of Israel.

Jewish groups are also dismayed by the re-election to Labour’s national executive of Pete Willsman, a veteran left-winger who claimed Jewish “Trump fanatics” were making up anti-Semitism allegations.