Layered network with subnets

I'm using 2 Linksys/cisco SMB RV082 routers which are operating in a stacked configuration.


Top router:
WAN via DHCP from ISP
LAN IP Address 192.168.2.1/24
Gateway: 192.168.2.1
Static route configured 10.10.10.0/24 via 192.168.2.10


Lower router:
WAN IP Address 192.168.2.10
LAN IP Address 10.10.10.1/24
Gateway: 10.10.10.1
Firewall disabled
DHCP/DNS via server 10.10.10.10
Static route configured 192.168.2.0/24 via 10.10.10.1


When I leave the working mode set to 'Gateway', the lower network can reach the internet, but not the upper network. And vise-versa.


If I set the working mode to router, the lower network can reach the upper network, but not the internet.

What piece am I missing so that traffic is allowed between both the upper and lower networks and the lower network also has access to the internet?

Thanks