My thanks go to the folk who gave me all the above advice regarding using my smart phone for music. It's all working out fine. Perhaps there are a few other phone dinosaurs who also benefitted from the advice.
To top it off, I've purchased the following bluetooth speaker. I was not in a position to spend a lot of money on one and the one I finally decided on appears to give me all the quality and volume I need, especially for use when camping.
It has several very good reviews on You Tube and I am very happy with the quality so far. It has a good long rechargable battery life, plenty of volume and a range in excess of 10 metres. I could have done without the lights but they can be switched off. Easy instructions in good English but hard to read without a magnifying glass. Also a USB recharging lead and an AUX cable.
Here it is :- https://www.amazon.co.uk/HEYSONG-Bluetoo...b_title_ce?th=1
Randa