@awnlee jawkingThe Wikipedia article is not 100% correct, for instance, the statement "As such there is no promotion from a class 4 private to a class 3 private" There most definitely is. In the infantry, you have to undergo a four to three upgrading course, which is just putting up with bullshit for a couple of weeks.The additional rank is only paid when you achieve a 'technical qualification' to go with it, ie pass your class 'B' driving licence (car) or another technical trade like Mechanical Handling Equipment (forklift) Once you have done that, you get paid your extra ยฃ40 a month or whatever it is these days.
Once your command staff has deemed you 'suitably experienced', you get to go on another pointless beasting exercise for a few weeks (your three to two), which is basically the same as the previous one. And you need a technical qualification, so that could be your class C (Rigid lorry) or the worst qualification to get in the army, your mini-bus ticket. And another ยฃ40 per month pay rise.
After another suitable period of time you get shoved onto a two to one course, which is basically the same as the previous two, lots of pointless drill, being shouted at. A lot. First aid, map reading, field exercises. Being shouted at again. Lots of sleep deprivation. Some more shouting. And then you pass. Or if the DS staff don't like you, you fail and have to go through all of it again... Once you pick up another qualification, you get another ยฃ40 a month to spend on boot polish for the next promotion course.
Which is your JPC, or Junior Promotion Course. Which varies in length depending on how much of an arsehole your unit is. It's about six weeks of being shouted at. Drill. Being shouted at. Sleep deprivation and all the same shit you went through the previous three times, but with the added bonus of now having to learn and give battle plans and organise and be in charge of a group of muppets.
And once you have completed that.... Nothing. Unless you were top student whereupon at the end of the course you are 'made up' ie given your first stripe. For the rest of you, you have to wait until a vacancy or a posting comes up... It is also the first rank in the British Army where you take a pay CUT Yes, you read that correctly, a pay CUT. Yes, when (if) you get promoted, you get your standard ยฃ40 pound a month extra (So you now get paid an extra ยฃ160 for doing the four promotion courses), but now that you are a Lance Jack, you now have to pay for mess dress and Mess bills! And HAVE to go to monthly mess do's which cost money and are unskipable, and are inevitably full of people that you don't like and now have to be sociable with.
The system is slightly different with each branch. The infantry do infantry shit on their 4-3 3-2 2-1, the Engineers do Engineering shit on theirs, the RLC do, god knows what the RLC do, but it doesn't seem to be very military orientated, etc etc
EDIT: The difference between your class one and a Lance Jack can be as much as being two hundred pounds WORSE off a month. So that's losing ยฃ200 a month for now having to put up with a heap of shite and generally having to act in a responsible/adult manner on a regular basis. It's not uncommon for a a fresh new LanceJack to moan to everyone around that they wish they had never done the bloody course (JPC) in the first place and that they are now broke... Whilst every one else sniggers. You don't start making money till you get your second stripe. You still have to pay mess bills and attend things you would rather not, but the pay rise now puts you on the same pay footing as a senior trooper/Pte/Spr