From today, both new and existing family plan subscribers can claim their free Google speaker, worth £49, simply by heading to the Spotify website. The offer ends on 14 May 2019.
Spotify's premium family plan costs £14.99 per month and allows up to six people to access the service using a personal account for each family member.
With that in mind, it's worth noting that the free speaker offer can only be claimed by the master account holder. However the device's built-in Google Assistant can recognize up to six different voices in the home, which means each person in the family can stream Spotify tracks from their own accounts.
Update: This offer is no longer available and Google is no longer offering free Google Home Mini speakers to UK family plan subscribers.