Posted: 08/10/2014 at 14:00
You would surely be allowed to grow lettuce and tomatoes in containers on your terrace/patio.
If you post a photo of the space, with info about North/South orientation you will get loads of advice about the garden. In the meantime, try to get out any weeds.
Not sure if it is a weed? Post a photo here by clicking on the tree icon.