EASA and the CAA use 'drone' as a synonym for unmanned aircraft. The coming changes will affect model aircraft. See EASA NPA 2017-05 2.3.1.5 (page 9).
If you fly a unmanned aircraft over 250g, you will be required to register. See table 2 on page 15 of the NPA.
There are hooks in the NPA that the DfT/CAA can hang exemptions for the model aircraft associations on, see article 14.