@michellemackay wrote:
Can I simply connect the Hub to the upstairs wall inlet and the TV 360 to the downstairs inlet in the same way I did before or do they now need to be connected by an Ethernet cable?
The best initial option for most people in your situation is hub to upstairs socket so your PC gets broadband (probably more important than getting TV if you are someone who needs broadband for things like WFH) and 360 to downstairs socket with the 360 connected to the hub by WiFi. In a reasonable worse case scenario of the WiFi connection not working well, you can try powerline or bite the bullet and run an Ethernet cable from the hub to the 360.
Edited to add that VM does provide free WiFi boosters if you have subscribed to Gig1 Broadband or a Volt package.
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Hub 3.0, TP-Link Archer C8, TP-Link TL-SG108S 8-port gigabit switch, V6