(2-part post):
Vesper99 seems to be assuming that you've been bailed to attend court. However your question makes it clear that you've been bailed to attend a police station.
It's quite common, for those who've been bailed to attend a police station, to simply be re-bailed. If this happens, you'll get no further than the front desk of the police station. The duty officer (or possibly the investigating officer, if he can be bothered to leave his office) will tell you that they're not ready to question you or charge you yet (e.g. because their investigations are continuing or because the investigating officer has gone sick). You'll be asked to sign a new bail form (which tells you the new date when you have to attend again) and given a copy.
It's not unusual for people to be re-bailed several times before anything actually happens. Eventually, you might be interviewed (or re-interviewed) if the police think that this is necessary (or if the Crown Prosecution Service have asked them to carry out a further interview). Following the interview, you might be bailed yet again (without being charged) or charged and then bailed to attend court. (You could also be held in custody until a court appearance but this would only happen if the alleged offence was particularly serious, if the police thought that you might interfere with witnesses, if the police feared for your safety or if they thought that you might re-offend before attending court).