No, that is just an additional disc , see the description
This additional disc will only work when added to BT's Whole Home Wi-Fi solution to further expand your superfast, super-reliable Wi-Fi network.
It would appear that you need this starter pack https://www.argos.co.uk/product/7345720 . It claims to be compatible with all ISP's but not having used it myself I couldn't say. There's a review here if it helps https://www.expertreviews.co.uk/bt/1405560/bt-whole-home-wi-fi-review-great-value-mesh-wireless