(a) Why has there been a delay in the issuing of driving licences in the past 12 months, (b) what steps have been taken to resolve the backlog, (c) what are the reasons that members of the public have to return to redo their fingerprints, photos and eye tests, (d) what are the reasons that no investigation regarding the matter has taken place and (e) by what date will an investigation into the matter take place?