If you're interested in accountancy or law then whats stopped you from pursuing those areas until now? Why not sit some relevant exams... there are certainly accountancy quals you can study for and would surely be a boost to a job application if you've already got some modules completed. Won't necessarily require a degree either...
to be honest, i was lazy at school/college. with my GNVQs i did nothing for the first year and a bit, and was told i would be removed from college unless i submitted something. so i sat down and did the whole 2 year course in about 6 weeks. and due to this i only got merits and not distinctions (which i know if i had actually knuckled down i would have got easily). now im not saying that to be big headed, coz im not. i just dont like to fail or be told i cant do something. so i made a concious effort to prove my tutors wrong.
unfortunatly, i then ended up being a waiter for cash and then doing nightshift for a well known pasty company as pay was good. this got me into a lazy routine.
i then decided to do computers as it was something that interested me and i seemed to be good at it. so i did my A+ at 20/21. whilst doing this i did lots of jobs to fund me as i was too old to get on the course for free.
i then tried doing pc repairs self employed, but my good nature meant i failed to charge people enough to make a living (i felt it was an easy job so either didnt charge or said 'i dunno £5 should do it').
i then got a job selling small electrical/brown/white goods, which i semi enjoyed apart from the pressure of selling extended warrenties.
i then met my ex wife and we had our kids and moved.
i got the job im in now after about 13months of being unemployed and living a horrible life. as this was a major stepup from being poor i kinda got stuck in it with no motivation to leave as it was regular money.
now im single again and well, not in a good place mentally. i hate my job and the people i work with, so i know if i dont change it now, i never will and it wont end well.
sorry for all the writing, once i start

so now i have a reason to retrain/learn and i want to take it before i find a reason to change my mind.
Maybe try and combine the teaching/tutoring/IT thing? I remember reading there was going to be a push to abandon the 'ICT' or whatever they're calling it in schools in favour of 'going back to BASICs' type learning.
Maybe do a PGCE and jump on the bandwagon?
teaching was something i really enjoyed (although i was never qualified it was all volunteer work with older people) and would love to do something similar, but paid this time

but is there not already a lot of trained teachers struggling to get work?