Is one or 2 duck feather pillow best? Is sleeping on your back best? How many hours sleep for a 51 year old is recommended? Thank you. Jo x

I see the issue of 1 or 2 pillows a matter of feeling comfortable, if one pillow is okay then you got it if 2 is better here you go.
The hours of sleep depending on our needs and it is completely individual it even varies from day to day the aim is always go take enough test and wake up feeling fresh.
As medically advised it's better to sleep on the right side.