The unit is 2019: KU5T-14G371-DDF, 32GB NA. This is the 2019 build Continental for the Chinese market and you live in the UK, so EU maps.
Sync 3.4.22110 & 2021 Maps - Feedback & Issues - Ford - CyanLabs Official Community
Delete Gracenote, install Sync 3.3.19052, then reformat the unit and install the cutdown version of the maps. You have filled up the unit and it will have issues with only 500MB of storage. You need to keep at least 1.5 GB of free space on the unit.