Re: Not Invented Here Syndrome
The article describes it as if ERTMS is a new system. It isn't, it's just relatively new to the UK.
The first stretches protected by ERTMS opened 11 years ago in Spain. Most modern high speed rail lines in Europe now use ERTMS, many thousands of kilometres of ERTMS protected railway line have since been installed and thousands of train services are protected using ERTMS on a daily basis.
Since its first use it has ERTMS has been through various updates already, currently on version 2.3.0d. Version 3.0 is currently being tested.
In short, ERTMS is not new or still in its infancy, it's been in production for over ten years. You could argue that the benefit of the UK being rather late to the game is that the Spanish, Italians, Dutch, Swiss, French, Swedes etc. have already worked out its teething issues.