If December 2014 is the latest issue of the document and that document is what is used to define "educational activities", then it is a lot of use.Of what use is a four year old document?.
Except it's superceded every few weeks or months by new regulations - and has little relevance in 2019.To you, probably very little .. .. but the document published in 2014 for first implementation in September 2016 is the current Statutory Instrument ( SI) to which all schools in England & Wales must adhere.
.. .. .. superceded by whom and with what 'new regulations' ?? Examples ??Except it's superceded every few weeks or months by new regulations -