That sounds like either you have an advert blocker extension in your web browser that is blocking the content or a browser setting is blocking the content, as some browsers come with ad blocking built in. Normally you can add a URL to a whitelist in the settings of the extension/browser if you want to prevent blocking.
My setup: V6 TV box, M350 Fibre broadband with Hub 3 in modem mode connected to a Netgear R7000 router. Telewest/VM user since 2001.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.