The university has a global audience, so always include the international code (+44 for the UK):
To contact the brand team, call us on +44 115 951 5151.
Call Jeff on +44 7777 778899.
Here's how we use spaces in phone numbers:
+44 115 951 5151
+44 7777 778899
That's one space after the international code and one after the area code. Then, if the rest of the number is six digits, leave them together. If it's seven digits, leave another space after the third digit.
Finally don't use “T:” or “M:” followed by a phone number. Just write the phone number itself or write it in a complete sentence if it's unclear.
If you have any questions, call Jeff on +44 7777 778899.
We know addresses aren't purely numbers, but this seemed like the best place to show you how to write them.
If you're writing for a mainly non-Nottingham audience, give the full address, including the postcode:
The event takes place at Nottingham Lakeside Arts, University Park, Nottingham NG7 2RD.
If you're writing for a university audience (such as advertising a concert), the name of a well-known building is enough on its own:
The event takes place at the Theatre Royal at 8pm on Tuesday 14 July.