If you don’t know it by now, you might never know. Voicemail greetings are incredibly important to users. It conveys identity, character, and image to callers. In an increasingly digital world, where business is conducted online and over the phone, phone presence is increasingly important. As such, your greeting is a crucial part of the platform. While there are a number of obstacles to be aware of, utilized properly, voicemail greetings can be incredibly helpful and beneficial; therefore, its in users best interest to invest themselves in creating a quality recording.
An ophthalmologist performs multiple duties related to eye and vision care. He/she may undertake eye surgeries of varying types, suggest medications, and perform eye exams and more. The job requires the utmost concentration and focus.

I could see an argument for relaxing that for mobile voicemail, on the basis that mobile phones are pretty personal and not generally shared by multiple people, but I've no idea whether that may have happened. Or, indeed, whether such policies may vary between organisations within the NHS.
“Hi, you’ve reached three-time fantasy football champion (insert your name) at (insert your company name). Please leave your name, number, and a fun fact about yourself, and I’ll return your call as soon as possible.”