Thanks for the reply.
That is what I expected and hoped for, but as soon as I tap the magnifier button/icon, the torch goes off.
If, from the magnifier, I go back to the torch symbol, it is not illuminated ie not available.
I think the answer lies in the Customise Controls/Secondary Controls screen, but 'Drag up two controls to always be shown' is a bit beyond my confidence. One control on offer is the torch, but which other control do I want to change or disturb?
Too clever by 'alf.
Thanks again.