Well it’s now sorted. I did refit the belt identically to the one taken off. Started and way too much noise. Intake cam adjustment was 32.5 before the time of belt change and the same after.
Set the crank to TDC and moved the cam a tooth forward so both marks aligned. A lot smoother and quieter now, even than before the timing belt change. Intake cam adjustment requested and actual is now 28 which I believe is the correct value?