Originally Posted by monkeyboy
...I must admit I was more concerned about taking up too much RT airtime especially around the busy South of the UK but it looks like it's the norm to offer the heading as well...
If that's your concern, you can still use:
"Continue on the heading 325 degrees, <callsign>"
in stead of:
"Continue on the heading and that's 325 degrees, <callsign>" or "Continue on the heading, <callsign>"
It keeps the RT airtime short, and gives both readback and the heading.