So confirming as the propogation of terminology seems to have confused things.
- ONT in Garage cabinet > Port1 in Lounge > WAN port of Spark Router
- LAN1 of Spark Router in Lounge > Port2 in Garage Cabinet > New Switch as mentioned next
- Place a small 5 port switch in Garage Cabinet to distribute LAN around house
- Switch in Garage Cabinet > Other room outlet and place an AP or Router in L2 bridge to act as AP and local LAN switch
- Repeat for other room
Cyril