Bernie, who was Jewish though not religious, said to Ethel: ‘How can you quote the Jewish Chronicle at me? It believes Jews should not be against Fascism, just anti-Semitism. What kind of political sense does that make?’

‘I hear that the Board of Deputies of British Jews says the same as the Chronicle,’ Ethel persisted. ‘Apparently there was an announcement yesterday in all the synagogues.’

‘Those so-called deputies are alrightniks from Golders Green,’ Bernie said with contempt. ‘They’ve never been insulted on the streets by Fascist hooligans.’

‘You’re in the Labour Party,’ Ethel said accusingly. ‘Our policy is not to confront the Fascists on the streets. Where’s your solidarity?’

Bernie said: ‘What about solidarity with my fellow Jews?’

‘You’re only Jewish when it suits you. And you’ve never been abused on the street.’

‘All the same, the Labour Party has made a political mistake.’

‘Just remember, if you allow the Fascists to provoke violence, the press will blame the Left for it, regardless of who really started it.’

Lenny said rashly: ‘If Mosley’s boys start a fight, they’ll get what’s coming to them.’

Ethel sighed. ‘Think about it, Lenny: in this country, who’s got the most guns – you and Lloyd and the Labour Party, or the Conservatives with the army and the police on their side?’

‘Oh,’ said Lenny. Clearly he had not considered that.

Lloyd said angrily to his mother: ‘How can you talk like that? You were in Berlin three years ago – you saw how it was. The German Left tried to oppose Fascism peacefully, and look what happened to them.’

Bernie put in: ‘The German Social Democrats failed to form a popular front with the Communists. That allowed them to be picked off separately. Together they might have won.’ Bernie had been angry when the local Labour Party branch had refused an offer from the Communists to form a coalition against the march.

Ethel said: ‘An alliance with Communists is a dangerous thing.’

She and Bernie disagreed on this. In fact, it was an issue that split the Labour Party. Lloyd thought that Bernie was right and Ethel wrong. ‘We have to use every resource we’ve got to defeat Fascism,’ he said; then he added diplomatically: ‘But Mam’s right, it will be best for us if today goes off without violence.’

‘It will be best if you all stay home, and oppose the Fascists through the normal channels of democratic politics,’ Ethel said.

‘You tried to get equal pay for women through the normal channels of democratic politics,’ Lloyd said. ‘You failed.’ Only last April, women Labour MPs had promoted a parliamentary bill to guarantee female government employees equal pay for equal work. It had been voted down by the male-dominated House of Commons.

‘You don’t give up on democracy every time you lose a vote,’ Ethel said crisply.

The trouble was, Lloyd knew, that these divisions could fatally weaken the anti-Fascist forces, as had happened in Germany. Today would be a harsh test. Political parties could try to lead, but the people would choose whom to follow. Would they stay at home, as urged by the timid Labour Party and the Jewish Chronicle? Or would they come out on to the streets in their thousands and say No to Fascism? By the end of the day he would know the answer.