Permeable pavements and similar stormwater control devices have not been exploited in the UK, in part because their adoption has been hindered by a lack of detailed knowledge of their hydrological performance. This paper describes a research programme that produced detailed information on the hydrological behaviour of a car park surface. The study involved the construction of full-scale permeable pavement model car park structures and a rainfall simulator for use in the laboratory. A monitoring procedure was developed in order to measure inputs and changes in drainage, storage and evaporation over short and long time-scales (2 hours to 3 months). A range of simulated rainfalls, which varied in intensity and duration, was applied to the model car park surfaces. Hydrological processes were monitored over an 18-month period. Results demonstrated that evaporation, drainage and retention in the structures were strongly in¯uenced by the particle size distribution of the bedding material and by water retention in the surface blocks. In general, an average of 55% of a one-hour duration, 15 mm h À1 rainfall event could be retained by an initially air-dry structure. Subsequent simulations demonstrated that 30% of a one-hour duration, 15 mm h À1 rainfall event could be stored by an initially wet structure (with a minimum time interval between rainfall applications of 72 hours).

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The education of children with special educational needs is often accompanied by a requirement for medical or healthcare provision. If this cannot be done safely then the child's access to education is limited. No standardized template for the delivery of a healthcare input to children in special schools is apparent. This study sought to explore, through the use of an indepth needs assessment exercise and focus group interviews, what the most appropriate healthcare role was for delivering health care in a special school catering for children with a broad range of severe learning disabilities. While an overwhelming viewpoint of participants in focus groups perceived that a nurse was the only suitable person to undertake the role, the evidence gathered prompted the research steering group to suggest to the contrary, i.e. that the role of a healthcare worker with a national vocational qualification (NVQ) level 3 in care was the more appropriate person to maximize both the role of the nurse and the quality of care provided to these children.