That'a fair enough and thanks for the explanation - interesting
I\ve still got VM business and swapped the res VM for a AAISP line - £129 a month and I can still bond them together.
I found that with VM and VMB you can still stream and use the web when someone is uploading - handy if needed but I use the AA line now for all uploads.
to the OP if you have still not sorted it - VMB and especially the vroom 3 (or plus if you need a mobile) if you can get it is a fantastic offering. FTTC backup always worth it or even ADSL if you need a backup at a lower cost.
talktalk business are still doing theirs free subject to line rental.