Speaking at an event to commemorate the Jewish people who died during the terror attacks in France, Mrs May said: ‘The dreadful events in Paris are a reminder of the serious terrorist threat that we face.

‘The attack on a Jewish supermarket, where four people were killed, is a chilling reminder of anti-Semitism, not just in France but the recent anti-Semitic prejudice that we sadly have seen in this country.

‘I know that many Jewish people in this country are feeling vulnerable and fearful and you’re saying that you’re anxious for your families, for your children and yourselves.

‘I never thought I would see the day when members of the Jewish community in the United Kingdom would say they were fearful of remaining here in the United Kingdom.