Indeed, Pilot Positive, I do seem to have miscalculated. It was just something I saw online and thought "hehe, let's put it here". However, there is so much misinformation in this thread I seriously doubt it's possible for it to have a positive impact.
I'm contracted for 3 years, the figure I quoted was after tax. Gross was £4520. Take note that this was for a pretty full month. I'm not saying the arrangement is perfect, just stating the facts.