Web of Science is planning to reveal some new features on 13 July 2014. Details are available at http://wokinfo.com/media/pdf/wok_5_14_releasenotes.pdf.
These include being able to choose the number of search fields you can use in basic search, and the most current Medline data.
Information on accessing Web of Science via the Universities of York and Hull can be found at http://libguides.hull.ac.uk/medicine/FindArticles.