Can anyone shed some light on whythe Ubuntu 18.04.1 installer can't see any partitions on the NVMe disc (so I can't add a new partition after the existing ones) but if I hit ctrl-alt-F2 to get to ...

Partitioning your hard drive is part of the process and could affect your current data. Make sure to back up your system completely before you begin. Depending on the arrangement, you may need to ...

Shrink the partition in Windows then reclaim the space in Ubuntu is easiest I could think of to avoid inconveniences like bitlocker and linux not playing nice with NTFS (from experience).

Installation type Now, you can choose your preferences, such as the language and the installation - we recommend selecting Normal installation. Confirm your choices by clicking on Continue. Do not ...