Holocaust denier David Irving may find himself sleeping on a park bench during his planned visit to Berlin, after the German capital’s hotel and restaurant association warned members not to accept a booking from him.

Irving, who was banned from entering Germany until last March, plans to visit in September, addressing guests at a $120- a-head dinner. However, a campaign by a Green Party Bundestag member led to hoteliers being urged not to “fall for the right-wing extremist trap.”