Upper pay range for class room teachers is now £37,871 (higher in London) That is 43% higher than the average UK salary.
I find this comment fascinating, particularly coming from a poster who laments the poor maths education her DC receive.
As pointed out above, the 37k is averaged over those who have SLT responsibilities, with most classroom teachers earning less. And it is unreasonable to compare a graduate salary with the average UK salary, when less than half of UK workers have a graduate degree.
Perhaps more relevantly, the average starting salary for a maths graduate training to be an actuary is around 30k, with the salary after 10 years being 50-100k. Salaries for accountants are similar. Salaries for maths graduates going into finance are much, much higher. It's not hard to figure out the single biggest reason why maths graduates don't become maths teachers. I can count on one hand the number of maths graduates I've taught who've then gone on to become maths teachers.