Ok, a few things:
Criminal Damage (if that is what they have told you they want to question you about) is not a summary offence, it is an indictable offence. There may be some statutory charge that is summary that they intend on charging you with, although I am doubtful of this given your wording and without knowing more.
Indictable offences - The prosecution can take place at any time after the commission of the offence, although there are some statutory time limits and procedural preconditions may exist for certain offences.
General Info:
Summary Offences - I assume you're an adult? If so, charges must be filed within 1 year of the date on which the offence alleged to have been committed.