There are many different viewpoints on who is / should be capable of installing fire alarm systems.
Such viewpoints are often based on that which is most financially beneficial to the person stating a particular view. People already in an industry are often desperate to make it difficult for 'newcomers' to jump on the 'gravy train'
In the 'good old days' when 'fire alarm engineers' were difficult to find, I found it easier to employ an electrician and train him to become a fire alarm engineer than, say, employing an intruder alarm engineer to train as a fire alarm engineer. The electricians invariably had better skills at installing the sort of cables and equipment used in fire alarms than other trades were.
These days there is also the 'problem' of the mains supplies to equipment - a proper electrician is qualified to install these.
I appreciate that a proper fire alarm engineer needs much more than good installation skills, in fact, I found that my company needed both employees who could install and others that could design, commission and fault-find. Very few were sufficiently good at all aspects.
Therefore my opinion is that 'justd0g', if he is a qualified electrician. is more than 50% suitably qualified and experienced to install fire alarm systems and if he takes the good advice given by previous posts regarding getting design, advice and commissioning by someone suitably experienced, then he should end up with a job that is as good (if not better!) than those provided by some so-called 'specialists' and possibly learn enough to take the first step in becoming acceptably profficient as a 'proper' fire alarm engineer.
It is my opinion that the current level of regulation provided by the need to meet British Standard recommendations of system design, installation and commissioning is sufficient. We are already allowing the creation of too many regulatory bodies (with all the paperwork and other costs they incur).
Surely, we can find enough work for ourselves if we are good at what we do, instead of trying to keep all of the cake for a select few by making laws to stop others getting a chance to taste it. There is a viewpoint that fair competition is the best regulation of price and standards - not hiding behind unnecessary legislation!