@N17 '

If you use IPsec, you cannot route all traffic through the VPN Tunnel, but you can do this with Wireguard site to site quite easily.

  @MR.S 

Thank you. Would you know how to set it up I have no knowledge of wireguard. 

  @N17 

Yes, I know, but it would be too extensive to create an installation guide for you, but look at the forum under gateways, there are some configuration guides that you can get some tips from, 

I also found this one.

https://www.tp-link.com/nordic/support/faq/3933/

  @MR.S thank you I managed to get it working but I'm having the same problem where the branch is using its own WAN address as opposed to using the WAN address from the head office. 

  @N17 

ok, the tunnel is up and running and you can communicate between the routers, that's good, go to peer on wireguard (client side) put 0.0.0.0/0 in allowed addresses. when you use 0.0.0.0/0 you will route all traffic via remote router

  @MR.S thank you so much that worked perfectly and the speed is incredible.