So here's my situation, we own a typical British highstreet shop with a flat/apartment above.

I'll be living in the flat temporarily.

We have fibre in the shop premises which is let out, the tenants are happy to let me leech their wifi to avoid having to take out a phone/internet contract to cover the couple months I'll be living above them.

I'm looking for a decent way to bridge their wifi to a LAN network in the flat. I can place it 3ft above their router so signal shouldn't be a problem.

If there's an easy way to secure it so it's internet only traffic then that would be nice, but any public use the guest-mode wifi anyway so it's not a priority.

Any advice and hardware recommendations are welcome! Would prefer a budget option since this is only temporary.