OSL have rapidly established themselves as one of the leading independent signalling design and testing companies in the UK market and are currently working towards achieving similar status outside of the UK. An exemplary track record has led to OSL becoming the delivery partner of choice with many major rail industry companies on both the client and supply-side, including Network Rail. Who have published an article named ‘Signals Explained’, for those who would like a brief understanding of what we do you can read it by clicking the link below: