I feel sorry for you Broadsta. You come out of the military and there are parasites on every corner trying to dip their hands in your pockets and nick yer hard earned cash all the while sticking some glossy ad campaign with gold stars and handsome men holding screwdrivers plastered all over the front to distract you while they reel you in hook, line and sinker. Believe me there really IS such thing as trying to paint a turd gold!
I was in the same position as you mate when I left, I was nearly caught when I took the bait from a salesman at my rehabilitation center. Told us to spend our resettlement cash with them and we'd come out of the army earning ÂŁ50,000 a year. I'd signed up an' all! Luckily I got the right advice before I handed over any of my readys and got on to a college course with my local state funded provider. It took longer, three years of study and three years of hard graft (four years in total) but I came out an electrician and not a wannabe electrician. In total my three year course + NVQ +AM2 cost about half what the private provider wanted for a course lasting the grand total of five weeks! As others have quite rightly said, there is no such thing as a domestic installer, there are only electricians and non-electricians. You won't even be competent to wire a plug after five weeks, let alone replace someones fuse box or rewire their house.
Make the right choice mate, you'll know you've made the right choice when you come out of your time with a cert that's actually worth something to both you and a prospective employer instead of leaving thousands of pounds out of pocket with just a fancy piece of ar$e tissue and no knowledge.
As for Trade Skills 4U, I've nothing bad to say about their teaching. I've never used them however I know others who have used them for the odd one or two day bolt on course and have had very good things to say about them. I've even met their head honcho, an ex MET Police officer, seemed to have integrity and was a nice guy to boot. That said, I'm under no illusion that he is just a shrewd businessman who has latched onto a massive flaw in the industry, one that has only appeared as a result of the complete lack of common sense of the government and corruption on a massive scale between the 'competent' persons schemes and back hander taking politicians.