The CAA's lanterns have not been serviced as they cannot find anyone able to do it.
The lamp in the Ishihara daylight simulating lamp had been used for about 20 years past its manufacturer recommended life. They put a new one in about 5 years back but that is probably still the same one.
The equipment is out of date and decrepit and not fit for purpose. A serious challenge in the civil courts would easily see them kicked into touch, however, it is the cost of fighting the case that makes it prohibitive.
The powers that be know this and play on it.
