Wi-fi Extension

[doyle1606]

I have a BT Broadband hub in my hhouse and a 5 PC LAN in my shed (about 50 metres away) that uses a TP-Link router to set up a local wi-fi with no internet access.

I want to piggy-back off the BT router and let my local LAN have internet access.  

How do I do this?

[testbench]

Why don't ypu use a wireless lan extender. 

https://www.techradar.com/uk/news/the-best-wi-fi-extenders

You can get these sort of things from amazon for about £20