www.ingolca.co.uk is currently pointing at a site that has nothing to do with Voice. Presumaly this is your old website?
Yes, you can use both/either of www.ingolca.co.uk and www.ingoltantertonnc.co.uk with your Voice site. You need to add either/both of them them in the Site Domain settings of your Voice site. Then you need to alter the DNS settings of the domain(s) to point to the Voice IP address: 126.96.36.199