You need to register for a username and password before accessing the data. To do this you need to follow these steps:
The UK Data Archive (UKDA) is curator of the largest collection of digital data in the social sciences and humanities in the UK. It is funded by the Economic and Social Research Council, the Joint Information Systems Committee of the Higher Education Funding Councils and the University of Essex. Founded in 1967, it now houses several thousand datasets of interest to researchers in all sectors and from many different disciplines.