Possible scenario No. 1:
If the police (and the CPS) are satisfied that they've got sufficient evidence to charge you, and that there's no point in you being interviewed, you'll just be charged and bailed to attend court. (Theoretically you could be refused bail but, since you've already been bailed, the chances of that are probably zero).
Possible scenario No. 2:
The police will interview you. Then, if they decide that they don't need to consult with the CPS (or to carry out further investigations), you'll be charged and bailed to attend court as above.
Possible scenario No. 3:
The police will interview you. Then (because they need to consult with the CPS before charging you, or because they need to investigate further), you'll be bailed to attend the police station again.
Possible scenario No. 4:
The police won't be ready to proceed at the present time. (The officers dealing with the case might be required in court on that date, or the police might still be waiting to hear from the CPS). If so you'll simply be re-bailed to attend the police station.
Possible scenario No. 5:
The police (and CPS) will have decided that they've not got enough evidence to prosecute and you'll simply be released.
Nos 1, 4 & 5 don't require a solicitor to be present, but you'd be advised tohave one there if you're to be interviewed, as in Nos 3 & 4. If you appoint a solicitor before you're due to attend the police station, he/she will be able to speak to the police to find out which of the preceding scenarios will be happening.
Chris