Quoting Wikipedia on Richard I (slightly edited):
Richard I was officially invested as Duke of Normandy on 20 July 1189 and crowned king in Westminster Abbey on 3 September 1189. Tradition barred all Jews and women from the investiture, but some Jewish leaders arrived to present gifts for the new king. According to Ralph of Diceto, Richard’s courtiers stripped and flogged the Jews, then flung them out of court.
When a rumor spread that Richard had ordered all Jews to be killed, the people of London attacked the Jewish population. Many Jewish homes were destroyed by arsonists, and several Jews were forcibly converted. Some sought sanctuary in the Tower of London, and others managed to escape. Among those killed was Jacob of Orléans, a respected Jewish scholar. Roger of Howden, in his Gesta Regis Ricardi, claimed that the jealous and bigoted citizens started the rioting and that Richard punished the perpetrators, allowing a forcibly converted Jew to return to his native religion. Baldwin of Forde, Archbishop of Canterbury, reacted by remarking, “If the King is not God’s man, he had better be the devil’s”.
Offended that he was not being obeyed, and aware that the attacks could destabilize his realm on the eve of his departure on crusade, Richard ordered the execution of those responsible for the most heinous murders and persecutions, including rioters who had accidentally burned down Christian homes. He distributed a royal writ demanding that the Jews be left alone. The edict was only loosely enforced, however, and the following March further violence occurred, including a massacre at York.
Wikipedia on the Massacres at London and York (1189–1190):
Richard I had taken the cross before his coronation (3 September 1189). A number of the principal Jews of England presented themselves to do homage at Westminster; but there was a long-standing custom against Jews (and women) being admitted to the coronation ceremony, and they were expelled during the banquet which followed the coronation, whereupon they were attacked by a crowd of bystanders. The rumor spread from Westminster to London that the king had ordered a massacre of the Jews; and a mob in the Old Jewry, after vainly attacking the strong stone houses of the Jews throughout the day, set them on fire at night, killing those within who attempted to escape. The king was enraged at this insult to his royal dignity but was unable to punish more than a few of the offenders, owing to their large numbers and to the considerable social standing of several of them. After his departure on the crusade, riots with loss of life occurred at Lynn, where the Jews attempted to attack a baptized coreligionist who had taken refuge in a church. The seafaring population rose against them, fired their houses, and put them to the sword. So, too, at Stamford Fair, on 7 March 1190, many were slain, and on 18 March, 57 were slaughtered at Bury St Edmunds. The Jews of Lincoln saved themselves only by taking refuge in the castle.
Isolated attacks on Jews also occurred at Colchester, Thetford, and Ospringe.A significant loss of life occurred at York on the night of March 16 (Shabbat HaGadol, the Shabbat before Passover) and 17 March 1190. As crusaders prepared to leave on the Third Crusade, religious fervor resulted in several anti-Jewish violences. Josce of York, the leader of the Jews in York, asked the warden of York Castle to receive them with their wives and children, and they were accepted into Clifford’s Tower. However, the tower was besieged by the mob of crusaders, demanding that the Jews convert to Christianity and be baptized. Trapped in the castle, the Jews were advised by their religious leader, Rabbi Yomtov of Joigny, to kill themselves rather than convert; Josce began by slaying his wife Anna and his two children, and then was killed by Yomtov. The father of each family killed his wife and children, before Yomtov and Josce set fire to the wooden keep, killing themselves. The handful of Jews who did not kill themselves died in the fire or were murdered by rioters. Around 150 people are thought to have been killed in the incident.
(Something is off about the above story.)
Oh, and one hundred years later, in 1290, King Edward I expelled all the Jews from England.
But that’s all in the past…