It would be unwise to look on supply as a full-time job. The end of the summer term and the start of the autumn term are notoriously devoid of work, so any income from July-Sept inclusive will be a bonus. Daily supply opportunities have diminished because of the way in which Heads are using CS and TA staff to cover absence. The rules are being bent pretzel shape by some. The chances that you will be paid to scale are decreasing. Agency flat rate is becoming the norm in cash-strapped LEAs. Regardless of your qualifications, you may find there is only CS rate work on offer - not much more than minimum wage in some places. Initially I'd advise that you say yes to anything and everything that's offered. Don't assume you'll just go hopping from one maternity cover to another. On the plus side, you do still hear the phrase "We're desperate for quality supply staff" - the trick is to work out how you offer that quality, stay sane and still earn a living. If you're far enough NE to work supply in Scotland, give it some serious thought. They don't use CS staff there.