Am I correct in thinking that I'd need an Openreach modem for this to work?
Yes, it would either have to be a third party Sky MER compatible router plugged into an (Openreach) VDSL modem, or a third party Sky MER compatible VDSL modem/router.
People with a Hub 2 will be unable to use another router unless they somehow acquire a VDSL modem.
Oliver.
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