London Borough of Newham v BS  EWHC 1909 (Fam)
High Court exercising inherent jurisdiction to determine the best interests of mentally impaired adult. Total lack of road sense and a tendency to rush into the road without looking not seriously irresponsible conduct for purposes of mental impairment. [Caution.]
The "seriously irresponsible conduct" part of the decision was not followed in R (GC) v Managers of the Kingswood Centre of Central and North West London NHS Foundation Trust (2008) EWHC x (Admin) (CO/7784/2008).