Thanks, I'm going to try this; I'm also looking at creating a new field on the CSV too with just the raw url, then reference that instead of one being sent via the mbox.

Thanks Eric, we are passing this information via the mbox (done via the DTM), as the moment we can't update the code to fix this issue and since it's on page load using the csv approach also doesn't work as that get overridden via the mbox call. I know it's not ideal to use velocity to fix this issue but the issue is currently stopping us launching to need a solution using that method if possible?

I didn't have a entityID on my page, once I added that everything started working. The documentation I read didn’t clearly highlight this, it was my assumption that providing a Feed was enough, on this page under Attributes, it says:Attributes can be provided in the mbox or through a feed. I thought that I didn’t need the mbox part as I’m providing it via feed, I realise now as a minimum I need the mboxCreate and set a unique entityID for each page, then I can use my Feed to add additional Attri...