out of interest, when was the current system installed?
At Maidenhead the installation has started and is scheduled to take 4 weeks, this is the first week. Regarding the rest of the Thames Valley, FGW are going through stations a couple at a time, it will take as long as it takes, as this is a massive operation and will take time. You'd be surprised how many Thames Valley stations actually have the new system now, such as stations towards Redhill.
Whatever happened to Racal Telecom?