We have recently purchased a Trimble R6 GNSS Topographical Survey System. This allows us to carry out centimetre level accuracy topographical surveys as a useful add-on to our current range of design services. As our engineers are normally involved in initial site inspections, then this can often be the best time to obtain the necessary site information, and can be more economical for clients than commissioning a separate topographical survey. The system consists of a single Trimble Rover Unit which can carry out real time precise surveys using a mobile phone link to provide base station corrections. We have carried out thirty surveys in the first month since buying the system.