The TS10 endorsement ceased to count, for totting up purposes, in 2007. Your licence became 'clean', in respect of that endorsement, in 2008. (i.e. you could apply for a new copy of your licence, which would not show that endorsement)
The first SP30 endorsement ceased to count, for totting up purposes, in 2008. It must remain on your licence until the date which is 4 years after the date of the offence.
Only the second SP30 still counts for totting up purposes. SP30 offences can result in between 3 and 6 penalty points being added to your licence, but if the matter was dealt with by a fixed penalty (rather than by a court appearance) there are currently only 3 'valid' points on your licence.
A conviction for driving without due care and attention can result in between 3 and 9 points being added to your licence. Alternatively, it can result in an immediate ban from driving. (There's usually a means-tested fine as well. The maximum is �2500. More usual fines are in the range of �200 to �800. Your current financial circumstances should keep the fine quite low but you'll still have to pay a �15 victim surcharge and probably costs of, say, �80 as well). In extreme circumstances a community service order, or curfew order, could be imposed.
The fact that your poor driving led to an accident involving injury means that the court will look towards the upper end of the scale of penalties. You'd be well-advised to attend court, using a solicitor to argue your case. With a bit of luck you might keep the penalty down to 6 to 8 points which, assuming that you only received 3 points with the last SP30, will keep your total points to lower than 12 (thus avoiding a ban).
Chris