No, It is possible... I know people who go to Stratton schools out of catchment, but Covingham is two catchments away (Coleview is in between Stratton and Covingham).
A lot of people here tend to send their children to the local schools, but the good ones are often oversubscribed, especially at secondary level. A 'good' secondary will have the 5 A-C pass rates in the 50% mark, the not so good schools are in the 30% mark, so the not so good schools are really not that good at all, iyswim! In fact they are pretty dire.
That said, it is possible!
HTH