But in the CAP 413 examples for radar vectoring (Chapter 5, page 7), any example where the heading ends with a "0", degrees is also said, and those examples ending in "5" do not have degrees. I cannot find anywhere a sentence that specifies this!
CAP493 Appendix E Page 10 Para 5.1.3 or CAP413 Chapter 3 Page 1 Para 1.1.3:
"For all transmissions, with the exception of those used for surveillance or precision radar approaches, “degrees” shall be appended to heading figures where the heading ends in zero, or in cases where confusion or ambiguity may result."