Can't install windows using Bootcamp after reinstalling fresh copy of Mojave

Due to some buggy errors in apps I decided to wipe my 2017 27" 5K iMac clean and install a fresh copy of Mojave and using Time Machine reinstalled all my apps and data. All fine. I had Windows installed previously and when I now go to reinstall Windows 10 via Bootcamp, Bootcamp hangs at the partition stage. I've removed the OSXRESERVED and BOOTCAMP partitions it creates and started again multiple times but no good. Any clues? Copy of my drives:

Last login: Sun Jun 30 16:23:03 on console

Mikes-iMac:~ mikegoodall$ diskutil list

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *2.0 TB     disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                 Apple_APFS Container disk2         2.0 TB     disk0s2

/dev/disk1 (internal):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                         121.3 GB   disk1

   1:                        EFI EFI                     314.6 MB   disk1s1

   2:                 Apple_APFS Container disk2         121.0 GB   disk1s2

/dev/disk2 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +2.1 TB     disk2

                                 Physical Stores disk1s2, disk0s2

   1:                APFS Volume Macintosh HD            370.3 GB   disk2s1

   2:                APFS Volume Preboot                 42.9 MB    disk2s2

   3:                APFS Volume Recovery                509.7 MB   disk2s3

   4:                APFS Volume VM                      2.1 GB     disk2s4