If you're answering bail to a police station, rather than to a court, you'll either simply be re-bailed (because the police and CPS need more time) or charged and bailed to appear before the Magistrates Court. When you eventually get there it will only be a procedural hearing because the law obliges the magistrates to pass the case up to the Crown Court. There may also be various procedural matters and adjournments along the way, so it's likely to be next year before anything substantial happens.
When considering sentence for 'GBH with intent' the judge has to take into account both 'harm' and 'culpability'. 'Harm' is determined by the level of the injuries sustained by the victim. If they were only just above the 'ABH' level, 'harm' will be assessed as 'low', but if they were life-threatening (or seriously disfiguring) 'harm' will be assessed as high'.
'Culpability' is determined by such factors as whether the offender deliberately sought out their victim to attack them, carried a knife or operated as part of a gang. (Such factors will push 'culpability into the 'high' category. A simple pub brawl would normally fall into 'low' culpability).
If 'harm' and 'culpability' are both low the judge must work from a 'starting point' sentence of 4 years imprisonment. Unless there are extremely unusual circumstances, he must pass a sentence of between 3 and 5 years.
If either 'harm' or 'culpability' is in the 'high' category, the starting point sentence is 6 years, with a range of 5 to 9 years normally possible.
If both 'harm' and 'culpability' are high, the starting point is 12 years, with a range of 9 to 16 years.
All of the above sentences refer to a first-time offender who is convicted after a trial. An early guilty plea can see sentencing cut by one third. The actual time spent in prison is normally half of the sentence passed although it can up to two thirds of that sentence if the sentence is 4 years or greater.
'Wounding' is only another name for 'GBH'. (It's the same offence and carries the same penalties). Having a 'wounding' charge on top of a 'GBH with intent' charge might not make a great deal of difference, since sentencing is likely to be 'concurrent' but it could make the judge consider a higher sentence for the 'GBH with intent' than he would have done otherwise.
So the lowest penalty you could reasonably hope for would be a sentence of 2 years imprisonment (i.e. 3 years less a third for an early guilty plea), meaning that you'd spend a year 'inside'. However, depending upon the exact circumstances of your offence, you might be 'banged up' for far longer than that.
Chris