Slightly confused by layout / description. What is the purpose of the Airport extreme? The description says BT Hub is Ethernet connected to TP Link but diagram shows Airport Extreme in between.
I notice the TP Link address is 192.168.0.100 -the third octet needs to be the same - 192.168.1.xx Turn off DHCP on TP Link - see what ip it gets from BT Hub - then fix it and fix camera ip 192.168.1.xx
Hope this helps.