is largely the old antisemitism, changing as always in detail to accommodate new contexts.

There has always been antisemitism in Britain. George Orwell wrote an interesting essay on the subject in the 1940s:

www.george-orwell.org/AntiSemitism_In_Brit...

My view is that it is part of the general xenophobia which has always disfigured our 'right little, tight little island' to quote a 19th century song. Foreigners and their descendants are too often treated as at best 'Not Quite One of Us'; at worst sinister villains.

I agree with MacShane that the problem is worse in some other Europaean countries, especially those of Eastern Europe, though there are neo-Nazi and other far-right movements everywhere.

I don't think there have been so many changes in antisemitism as such, though there are worrying increases in antisemitism (and in anti-Muslim prejudice too) every time that there are hard economic times or wars that involve the Middle East. One change, however, is that the Internet now makes it far easier for larger numbers of people to access vile antisemitic propaganda - it's easier to click on an antisemitic site (probably one that screams that it's telling you the TRUTH!!!!!) than to go and attend a demagogue's speech.