Prime Minister Syed Yusuf Raza Gilani will represent Pakistan at the second Pakistan-EU Summit at Brussels to be held on April 21 . Pakistan attaches considerable importance to further deepening and broadening its close cooperative relations with the European Union and its member states, says a press release issued by Foreign Office. Since the holding of the first Summit in Brussels last year (17 June), Pakistan-EU relations have witnessed significant momentum towards forging of a robust strategic cooperative partnership. The 27 member states European Union is Pakistan's largest trading, investment and development assistance partner.