Thanks for all your replies folks!
- Yep, a 8800NL would be one option - funnily enough I used to use one for ADSL, and I see there's a new R2 version now.
- I'm just trying to cut down from two units (SR102 & 8324) to one due to where the phone socket is located. Fortunately, I'm on a Huawei cabinet, but I'd rather just use the ZyXel instead of buying another router, and adding to my router collection.
- It looks like the encapsulation type is where I've been going wrong on the VDSL side.
I'll have another go in the morning (there would be household uproar if I kill the internet tonight!), and report back when I put the settings in the VDSL side rather than ethernet WAN.
Thanks again...