co.uk zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2401:fd80:400::1, 2a01:618:400::1)
co.uk/NS: No response was received from the server over UDP (tried 12 times). See RFC 1035, Sec. 4.2. (2401:fd80:400::1, 2a01:618:400::1, UDP_-_NOEDNS_)
uk zone: The server(s) were not responsive to queries over UDP. See RFC 1035, Sec. 4.2. (2401:fd80:400::1, 2a01:618:400::1)
co.uk/A has errors; select the "Denial of existence" DNSSEC option to see them.