"It said paper licences would have to be replaced by photo licences in 2015..."
That is just bad journalism. There was no official announcement prior to 2015 that photocard licences would become mandatory in that year, but rather that paper counterparts to the photocard were to be abolished, which they were on 8th June 2015.
The BBC seem to have lifted the story from the DM which included the erroneous statement but failed to include this more accurate final statement -
The warning comes as the Government prepares to abolish the need for a fiddly paper ‘counterpart’ to accompany the photocard driving licence as part of its ‘Red Tape Challenge’ to cut down on paperwork.
A spokesman said: ‘As part of a Government-wide process to get rid of unnecessary, burdensome and overcomplicated regulation, the Department for Transport is, among other measures, scrapping the regulation requiring motorists to hold a paper counterpart to their driving licence by 2015 at the latest.’
http://www.dailymail.co.uk/news/article-2257383/2m-drivers-dont-know-licence-invalid-face-fines-1-000.html