Well known British Jews have been warned about revenge attacks carried out by Islamic extremists. Authorities fear a hit list of celebrities and politicians has been drawn up, including Sir Alan Sugar and record producer Mark Ronson.
A web site has been compiling a list of British Jews, one user of the site wrote, "It would be beneficial to start compiling a list so that we can write polite letters reminding them of the injustices of Israel."
Security specialist Mark Gardner said: “We sent out a security advisory note when the violence began and updated it today. It is a notice reminding people to ensure security routines are properly implemented.”