Thank you Brian and John for your well thought out replies.

I have done some playing around with tongue arch and notice that when I use the ‘ee’ vowel (without the trumpet) the lips tend towards the smile which I want to avoid. If I try the ‘tsss’ (with trumpet) the note normally stops immediately.

I have learned so much from the forum and appreciate all the questions and answers. I will keep experimenting and hopefully join in to the discussions more frequently. It is amazing that sometimes a simple comment made by someone can make such a difference.

Enjoying my journey – it is all great fun although very frustrating at times.

Colin