Joanna Hall, the popular diet and fitness presenter for ITV's This Morning show, reveals her simple 5 step fat loss plan. The golden rule is 'no carbs after 5pm' - and with Joanna Hall's help the rest is easy Joanna Hall introduces her simple 'Carb Curfew' plan- no carbs after 5pm- to help you lose weight. Joanna's weight-loss plan consists of just 5 simple steps, making this fitness regime easy to remember, understand and follow.