The three-day international Wilton Park Conference dedicated to EU enlargement will be opened today in Sofia. A total of 75 representatives from EU member and aspirant countries, will take part in it. Wilton Park, British Foreign Office world famous conference centre for discussion of international issues, is among the organizers of the event. Wilton Park has organized a series of conferences in the EU candidate states for the last ten years. The idea to discuss Bulgaria’s EU bid in an informal atmosphere was given by the British Embassy and the European Institute in Sofia. It is also hoped that the conference will help Bulgarians understand better the EU entry. The discussions during the conference are confidential. EU Chief Negotiator with Bulgaria Michael Leigh, who arrived in Sofia March 18, will be one of the participants in the Wilton Park Conference "Enlarging the European Union".