benn wrote:yes both Referees were British and the 2nd Referee sigend for the pic aswell. on the form it says that it requires two Referees
Not sure what you mean by signing for the picture (that is required for passport applications, but not for naturalisations). What Jambo meant is: one reference needs to be of professional standing (any nationality) and the other reference needs to be a British (any profession). The first one doesn't require a passport number.
So if both of your references are of professional standing and one of them forgot the passport number, everything is good. If only one of your references is of professional standing and that is the one who forgot the passport number, everything is good. If only one of your references is of professional standing and the other one forgot the passport number, there will likely be a delay as HO will probably investigate further.