Just why viola players seem to be the butt of most orchestral jokes has always evaded me.

And when you hear the viola in the hands of Sarah-Jane Bradley you know you are hearing an angel in performance.

I have been listening to Bradley since she was in the Sorrel Quartet and the Leopold String Trio and it comes as no surprise that she is now in great demand as a soloist and a chamber musician all over the world.

And as part of a duo with husband Jonathan Ayers on piano she came up with a magical programme of romantic music at her lunchtime recital, ranging from the Baroque sound of Marin Marais to the modern notes of Hindemith via Schumann and Elgar.

Her sound is beautifully sweet and resonant and takes in the full range of the instrument's colour and warmth.

Particularly exquisite and haunting was her reading of Elgar's Chanson Matin-Nuit and Shumann's elegiac Marchen Builder.

Bradley and Ayers have been working together since 1994 and their obvious, almost telepathic togetherness is sublime, not least in the tricky Hindemith Sonata with which they ended their recital.