Gillian, SS is geared towards the average woman with a moderately sedentary lifestyle. If you do loads of exercise then you are unusual amongst us on here and, if I were you, I would tailor the plan to take account of this, by adding in a little extra food, maybe a banana and/or a glass of milk and/or a handful of seeds on top of your PEP allowance every day. Eat this straight after your run as an extra to keep you going til you have cooked a proper meal. (The PEP doesn't allow this, this is my own personal advice!)
Don't forget that quality is more important than quantity as far as diet is concerned... check that you are getting enough fibre to fill you up and enough nutrients to keep you healthy.
www.nutritiondata.com is a good tool for this.
Don't leave it until you get too hungry before you start thinking about what to have for your next meal, remember, "If you fail to plan, you plan to fail".
I really admire you, it will be great to have another fittie on here along with us more slothful ones....

But don't feel entirely alone, there are quite a handful with enviable fitness routines, maybe start a thread asking them to reveal themselves and you will pick up some good tips from them.
Take care,
Gin x