Not using minimization,
I've set a domain override for that now so it uses 1.1.1.1, it resolves but its really slow see below how long it takes to resolve (Query time: 2051 msec) compared to doing a dig directly to 1.1.1.1 (Query time: 17 msec)
stevetozer@Steves-MacBook-Air:~$ dig epdg.epc.mnc020.mcc234.pub.3gppnetwork.org ; <<>> DiG 9.10.6 <<>> epdg.epc.mnc020.mcc234.pub.3gppnetwork.org ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 25550 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;epdg.epc.mnc020.mcc234.pub.3gppnetwork.org. IN A ;; ANSWER SECTION: epdg.epc.mnc020.mcc234.pub.3gppnetwork.org. 2677 IN CNAME epdg.epc.wip.mnc020.mcc234.pub.3gppnetwork.org. epdg.epc.wip.mnc020.mcc234.pub.3gppnetwork.org. 1 IN A 188.31.254.71 ;; Query time: 2051 msec ;; SERVER: 192.168.50.1#53(192.168.50.1) ;; WHEN: Sat Jan 04 15:35:46 GMT 2020 ;; MSG SIZE rcvd: 114Thanks for all your help with this