Thanks looks like it will be the ticket.
I did however come across this post here I followed Neos fixed post suggestion of adding
6,followed by my ISP dns under Interface>LAN>DHCP server>DHCP-Options and also Interfaces>WAN>Advanced setting>Use DNS servers advertised by peer>ticked
saved it, rebooted it and restarted my WG interfaces, WAN, LAN interfaces several times and its spot on no more DNS leaks all devices that are meant to be on WG AirVPN use the correct VPN dns and pbr devices also use the ISP DNS it looks like I did not require to add 1.1.1.1 per the guide instructions for pbr.
I will give it a good testing over the next few weeks, if not will try to learn Tagging.