The Stephen Roth Institute for the Study of Antisemitism and Racism, which is a terrific resource for information about antisemitism around the world, has published its report on the United Kingdom for 2008/9.
The UK report, authored by CST's Michael Whine, can be read here, alongside entries for many other countries. It covers the activities of extremist parties and organisations, antisemitic incidents, Holocaust Denial and Holocaust commemoration, legal approaches to antisemitism, relevant court cases and the work of government and other official bodies.
