Following up suggestions that have been made earlier, for which many thanks, some queries.

Loud is not really needed as I mainly want it to sing with and to play airs. If I am playing jigs and reels, I will stick to my recorder for the time being.

Barleycorn do refurbished concertinas and seem reasonably priced. They mention brass and steel reeds. Anyone have observations on these? I imagine brass reeds would be quieter as brass is a softer metal, but I suspect will be more prone to metal fatigue.

Anyone opinions on Marcus Concertinas. They seem reasonably priced, cheaper than Morse in the UK as they are not imported.

Comments and observations will be much appreciated.