This excerpt taken from the NDAQ 8-K filed Dec 11, 2006.
Our lack of due diligence access to LSE may result in the inability to foresee certain risks associated with LSEs business.
We have not had any due diligence access to LSE and its material non-public financial or other information in the context of the offers. While LSE is subject to periodic reporting obligations in the United Kingdom, there can be no assurance that information publicly disclosed by LSE includes all information necessary to make an informed assessment of LSEs results of operations, financial condition and prospects. There is a risk that we will fail to discover certain liabilities of LSE or operating or other problems of LSE.