I always buy McCain Roasts Crispy & Fluffy Roast Potatoes as they are really tasty, crispy on the outside, and fluffy and soft inside.
I have bought other shop brands of but found these ones to have more taste and they are not dry inside like the others.
I normally baste a bit of the juices from my cooked chicken to make them extra tasty.
I do recommend these, and you can pick these up in all supermarkets in small and large packets. They are often on special offer.