I just spoke to the teaching information line and I got some good advice. Apparently there is a shortage of maths teachers and there is even spaces available on courses due to start in September.
They see me as a good candidate because I have a lot of professional experience using mathematics and I have business and personnel management experience too, both professionally and, more recently, from running my own company.
I really want to be a teacher because I just feel like its my vocation (I know that's not a fashionable word).
However, they did say that I would likely have to take a loan of £9k to pay the tuition fees, which i would then start repaying as soon as i got a job which would pay £25k per year before tax as we live just outside London.
I fully accepted that I would not be paid well but Wow! £2k a month from which i have to pay tax as well as transport to work, clothes for work, childcare and repayments on a debt of £9k??? I don't think I'll break even. I am really shocked.
They said that the salary could go up by a large percentage (but I am a maths graduate and I understand that a large % of a small number can mean a very small increase in absolute terms, so that's just using statistics to mislead).
DH doesn't want me to become a teacher. I don't think its about the money, although he would prefer me to earn a good salary (which i used to do) if I am not going to be a SAHM. However, I need to really think about this now because I had not realised that as well as buying my food, paying our rent, travel, entertainment etc with his salary, I may need him to help repay my student loan too. Expecting DH to subsidise my wish to teach is asking a lot.