V. Apart from the heading of the Grounds of Appeal and the copies of that 7 May 1997 letter, nothing was said in the Grounds of Appeal about the fact that they were being filed by a different company to that which had conducted the opposition and, more recently, filed the Notice of Appeal. No reference to the apparent discrepancy was made in subsequent written submissions by either party prior to the Board's communication referred to in paragraph VI below. After the Grounds of Appeal were filed, all subsequent submissions on behalf of the appellant were made by a professional representative all of whose letters, both prior and subsequent to the Board's communication, have referred in their headings to the patent "opposed by The Procter & Gamble Company". Shortly before the oral proceedings, which were held on 10 January 2001, the respondents (proprietors) changed professional representatives.