I've emailed Moto about updates for UK users and hers the reply.
Greetings from Moto & Lenovo customer support.
I understand that you have not received any security patch update yet from January. The OTA update rollout is a phased process, so it may take some time before it is made available to all the devices across the world. Please be rest assured, you will get an update soon. We don't have exact dates, but we're working to roll it out to all eligible devices globally as quickly as possible.
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Software updates are released in batches. Not all phones can receive the update at the same time as the servers would not be able to handle it. Once the update is released, you will receive a notification or you may also go to Settings > About Phone > System Updates to check for any pending updates.
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For any further assistance or information please do not hesitate to contact us. Below are the contact information of Moto & Lenovo UK support for future reference