So ADSL modem should be in bridge mode and in a different IP range to the router?
Sorry my network skills suck...
No.
When your ADSL is in bridge mode, you'll have to dial the PPPoE connection (to your ISP) from the router that is connected to the ADSL modem.
If you leave the ADSL modem in router mode, where it dials the PPPoE connection, then you will just have to set the ADSL modem's IP address as the default gateway on the router that is connected to it.
Here's a quick guide on subnets & routing:
1) A subnet is defined by an IP address and subnet mask (eg. 10.0.0.3 IP address with a 255.255.255.0 subnet mask, accounts for the network 10.0.0.0 - 10.0.0.255)
Any traffic going to an IP address within that subnet will go directly to that IP address, without passing through the default gateway. If you haven't defined a default gateway or specified an IP address that isn't a gateway/router, then those packets will never reach their destination.
2) Once the traffic has to go to an IP address outside that subnet (eg. to 192.168.0.2), then your PC/router will send the data to its default gateway (which might be 10.0.0.2 in this case).
3) When the default gateway gets the packet that has to an IP address that falls outside its LAN subnet, then it typically sends it out on its WAN port and it also changes the source address to its own IP address (with something called source NAT or MASQUERADING).
Here are 2 example network setups: 1 that is routed and another that is bridged (except for the ADSL modem):

* I've marked each subnet in the same colour text & lines (representing WiFi/LAN connections). Click the image or
this link to view the full size image.
In the routed setup, your access would be restricted, unless you add static routes on WiFi AP 2 and the ADSL modem. Without setting up static routes, the routers will do source NAT (replacing the packets source IP address with its own) and then machines on its WAN side will not know the original source to send the packets back to.
So I'd recommend that you add static routes like follow:
for WiFi AP 2:
add a static route WiFi AP 1's subnet: IP address 192.168.0.0, subnet mask 255.255.255.0, gateway 10.0.0.100
for ADSL modem:
1) add static route for WiFi AP 2's subnet: IP address 10.0.0.0, subnet mask 255.255.255.0, gateway 192.168.1.1
2) add static route for WiFi AP 1's subnet: IP address 192.168.0.0, subnet mask 255.255.255.0, gateway 10.0.0.100 (or also 192.168.1.1 for the gateway)