How do I put my Virgin Media Hitron CGNv4 router into modem mode?

To put a Virgin Media Business router (hereafter referred to as Hitron) into Modem mode, you can follow the link from Virgin Media's website below:

How do I put my Virgin Media Hitron router into modem mode

The alternative way if you are unsure is to contact Virgin themselves, in which their staff will be able to do it for you!