BA Social Work - Interview at Coventry Uni

I have been invited for an interview at Coventry University on 18 April 2012 for the BA Hon Social Work 3 year degree programme. Is there anybody out there who's also been invited to interview? As per the invitation letter it state an assessment will take place and those that have been successful will be interviewed in the afternoon. I'm not sure what to expect as it state in the letter a preparation is needed for this assessment..my mind is thinking could it be English literacy test and maths test, watch video, case study scenario etc..could someone please shed some light on this matter. I have contacted the university they don't give much information out regarding this assessment.