Anna's version of Baked Saffron Chicken with Asparagus and Butter Beans

I didn't end up using the right amount of saffron as 1 packet of saffron crushed did not make 1 tsp. I think that it would probably be easier to put the flour mixture in a plastic bag and then add the chicken and toss to coat. I don't think I cooked the carrots enough, they were slightly too crunchy, so next time I will cook them for longer. I used tinned (Delmaine) Butter Beans and they were OK. I cooked all the chicken, but only half the other bits. I'm going to reheat the chicken for dinner tomorrow and cook the other veges again from scratch.