Health Education England have developed some elearning modules for literature searching. They are are now available from https://www.e-lfh.org.uk/programmes/literature-searching/
Module 1 Introduction to searching http://portal.e-lfh.org.uk/Component/Details/479951
Module 2 Where do I start searching? http://portal.e-lfh.org.uk/Component/Details/479954
Module 3 How do I start to develop a search strategy? http://portal.e-lfh.org.uk/Component/Details/479963
The next three modules on ‘Developing the Skills’ will be launched later this year and ‘Applying the Skills’ modules will be available in early 2018.