This is where you can get tested this coming week. Mobile sites - must be booked in advance: High Wycombe - Saturday, January 16, for up to two days High Wycombe - Friday, January 22, for up to three days Princes Risborough - Saturday, January 16 Gerrards Cross - Saturday, January 16 Gerrards Cross - Saturday, January 23 Marlow - Wednesday, January 20, for up to two days Walk-through and hybrid sites - must be booked in advance: High Wycombe, Bucks New University Aylesbury, Gateway Centre car park Slough, Montem Park These sites are open for use by anyone with coronavirus symptoms, and all tests must be booked first – they are not available on a ‘drop-in’ basis.