The retained Y
/juː/as in tune
Tune and news keep the Y, so tune is tyoon, not toon.
Common habit
toon
→
British
tyoon
What gives you away
Dropping the Y, so tune, news and duke become toon, nooz and dook.
How to fix it
Slip a tiny y in before the oo. Tune is t-yoon, not toon.
Practise words
tunenewsdukeTuesdaynewstupid
Hear how you do on tune.
BritSpeech scores retained y on your own voice, on your phone, in seconds, then drills it until it sticks.