The Samknows Realspeed test should work for a VM Hub (3/4/5) in Router mode.
Known blockers are all VPNs and VM routing issues that make the public IP not look like a VM customer ( e.g. have a BT or Telefonica IP )
Use the link below, you should see :
IPv4 - present
IPv6 - not present
ISP - Virgin Media Limited
Location - should be in the correct area
If the results are OK - try Realspeed again perhaps tomorrow.