Asking for help, clears your mind and thinking.

Now resolved, forget about bridging and gateway/routing tables, its all done in the firewall.

I already had the PPPoE bit working.

Define 80.x.y.z/29 as your LAN2 in the advanced section you can find a gateway setting for WAN2_PPPOE.

For WAN2 Outbound NAT add a entry for 80.x,y.z/29 of NO NAT.

For NAT 1:1 add an entry of 80.x.y.z/29 for external and internal.

And thats about it! Thanks for your help ;-)