Areas Covered Loudwater completely cover the following postode areas: High Wycombe & adjacent area - HP5, HP6, HP7, HP8, HP9, HP10, HP11, HP12, HP13, HP14, HP15, HP16 Slough & adjacent area SL0, SL1, SL2, SL3, SL4, SL6, SL7, SL8, SL9 Also parts of Uxbridge (UB Postcode) PLEASE NOTE: Loudwater Driving School prefers Wycombe and Slough driving test centres. Please contact us for availability if you require another test centre. © Loudwater Driving School 2008. All rights reserved.