Help with an SEO issue

I need an SEO specialist who can help with two client websites, which are showing .uk.com in all their search titles but not on the page title. It is a weird one.

The site maps have been submitted again, and still no change.

I just want advice, as there is an SEO company working with my client, over whom I have no control. They will retain the account. But if anyone out there can advise me about a solution to this issue, I would be happy to pay the fee.