The talk marked the end of the first day of Sanader's two-day trip to London, during which he spoke to Prime Minister Tony Blair and met business people in the City.
Sanader briefed the Institute's members of the current political and economic situation in Croatia and said Croatia was very similar to those countries which joined the EU two years ago.
He said that what had been achieved was not accidental but the result of a lot of work.
Sanader voiced confidence that the formalities of Croatia's EU membership would be met soon, voicing hope that the Union needed Croatia because of its important role in the stabilisation of the region.
He assessed the stabilisation of the region as a key achievement and voiced confidence that the South Eastern Europe Cooperation Process, which Croatia is currently chairing, would soon replace the Stability Pact for Southeast Europe, which he said had filled its role.
Answering questions, Sanader said a solution for Kosovo must ensure the protection of minority rights in accordance with the highest standards and that Belgrade must be involved in the finding of a solution so that Serbia, and the entire region, would not be destabilised.
Asked if Croatia would help Serbia implement its Action Plan for full cooperation with the Hague war crimes tribunal, Sanader said Croatia would contribute as much as it could to the arrest of Bosnian Serb fugitives Ratko Mladic and Radovan Karadzic so that they could finally face the indictments before the tribunal.
Sanader underlined that there should be no yielding to Serbia regarding cooperation with the UN court. He said Croatia had cooperated and that Europe's doors opened only when it met the last condition for full cooperation.
Sanader announced he would discuss the implementation of the Action Plan with Serbian Prime Minister Vojislav Kostunica in Belgrade on Friday, and revealed that Croatia's chief state prosecutor Mladen Bajic was in constant touch with his Serbian counterpart.