contemporary exteriors high schools high-level walkways highschools modern outside semi-circle semi-circular semicircular buildings horizontal image veranda verandah verandahs verandas 2000's 2000s 21st Century Britain British EU English Europe European GB Great Britain PFI UK United Kingdom architectural architectural design architecture balustrades balustrading children circular classroom blocks comprehensive comprehensives contracts copy space covered walkways curve curved deck access design education educational buildings exterior external galvanised hard landscaping horizontal landscape design metal paved areas paving paving design people perforated planting plants playground playgrounds projects public schools raised walkways round rounded schemes school school yards schools schoolyard secondary senior shaped state schools steel students twenty noughties walkways