Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain newc-19-b2-v4wan-173230-cust295.vm8.cable.virginm.net is not the root of its zone.
Instead, try zone transfer on vm8.cable.virginm.net .
Instead, try zone transfer on vm8.cable.virginm.net .