09/06/2006 (Agence Europe) - Ahead of the European Council, the leaders of the European People's Party (EPP) Wilfried Martens and the EPP-ED group in the EP Hans-Gert Pöttering have written to Commission President José-Manuel Barroso calling on him to commit further to the European Constitution, said the FT Deutschland on Friday. Disquiet over Mr Barroso's attitude on this issue had already been expressed at a private meeting of EPP leaders, said the German daily.