Just to clarify things a little
First Aid at Work
These courses are booked and paid for by your employer and deals only with the workplace. There are several to chose from starting at a 1 day basic course, up to a much more in depth 4 day course, All of these ar HSE approved courses for dealing with colleagues in the workplace, and the prices start at around £100 up to nearly £300. There are other HSE courses specialy aimed at expeditions but they have basically the same content but with a few added extras for wilderness situation ie ambulance may be a long time reaching or casualty halfway up a mountain type extra information and a lot more expensive. Members of the public cannot choose to do this course as an option, only employers can book a course for members of their workforce.
Public First Aid courses
These once again come in varying lengths and depth with regards to subjects covered but are in essence very similar to the HSE courses, the main difference being that you are trained to treat anyone, not just in the workplace, you will also cover child and baby first aid which is not covered by the HSE courses unless as an added extra. The most in depth public course takes about 27 hours which can be done over 2 full weekends, or can be done over 3 months where you attend just 1 night a week. Another difference is the public courses provide training to diagnose and provide certain drugs namely paracetamol and aspirin in the treatment of certain conditions and the assisting of casualties to take prescribed medication, ie insulin, and in use of epipens for anaphylactic shock treatment. The cost for these course are between £10 for a very short 4 hour course up to £60 for the full monty, which BTW is exactly the same training as members of the first aid providers give to their members who cover first aid at public events such as t in the park and the london marathon. The British Red Cross have now included automated defibrilater as standard on the big courses as of a month ago.
Again just to emphasis HSE courses or first aid at work can only be used in the workplace and is of a lesser depth of training to the public, and costs up to 6 times as much.
Public courses are for the general public, is a fraction of the cost of an HSE course, much more in depth, and are able to treat anybody anywhere.
Hope all this makes sense, or if you want to know more feel free to PM me with any queries.