How long does a conveyancing client have to register a complaint with the Legal Ombudsman?

There are two relevant time limits; The Legal Ombudsman will accept complaints up to six years from the date of act/omission, or three years from when the complainant should have known about the complaint. However, this new limit will be introduced gradually so at the moment the problem must have happened on or after 6 October 2010. Or, if the problem happened earlier than that, the client must not have been aware of it before 6 October 2010.