Second Router

[RobDavis]

I am currently trying to add wi-fi to my shed at the top of the garden which I am changing to a summer house.  My question is can I run an Ethernet cable from my current BT Hub 2 up to the summer house and plug only into another BT Hub 2?  Will this work and give me WiFi in the garden where it doesn't currently reach?

thanks

[licquorice]

Yes, but unless you already have a spare Hub2, you would be better off buying a wireless access point (WAP)

If the shed is on the same mains consumer unit as the existing hub, you can simply use powerline adapters.

[RobDavis]

How does the WAP work?  Would I still need to run an Ethernet up to the shed from my existing hub? 

[licquorice]

Yes, you are effectively considering using the second hub as a WAP so a simple WAP in the first place is an alternative if you are having to make a purchase.

However, powerline adapters obviate the need to run an Ethernet cable.

See  https://www.tp-link.com/uk/home-networking/powerline/