Worth checking that your domain forwarders are working.
We've had numerous cases over the last few weeks of domain forwarders just ceasing to work and "mysteriously" going to 123-reg holding pages instead.
Hello,
My name is Aidan and I work for 123-reg.
I would like to look into these forwarding issues for you so I can advise fully on what has happened here.
If you would like me to, please provide a support ticket number or domain name, or email directly to customerexperience@123-reg.co.uk and I will be in touch.
Regards,
Aidan