10It shall be a condition of the exemption of any data under paragraph 7 that the data are not disclosed except as permitted by paragraph 11 and of the exemption under paragraph 8 that the data are not processed for any purpose other than that mentioned in that paragraph or as permitted by paragraph 11, but—
(a)the exemption under paragraph 7 shall not be lost by any disclosure in breach of that condition, and
(b)the exemption under paragraph 8 shall not be lost by any processing in breach of that condition,
if the data controller shows that he had taken such care to prevent it as in all the circumstances was reasonably required.