Santander – Hounslow, High Street – Opening Hours & Store Details Santander is conveniently located in Treaty Shopping Centre at 223 High Street, a 1.48 mile driving distance south-east of the centre of Hounslow (a few minutes walk from Holy Trinity and Treaty Centre). The store is pleased to serve people within the locales of Spring Grove, Osterley, Hounslow West, Woodlands, Worton, Lampton, Hounslow Town Centre and Whitton. This page will supply you with all the information you need on Santander Hounslow, High Street, including the working hours, store location, telephone number and more important info.