The very nature of the term "independent witnesses" precludes the tapas 7. The allegation is that these seven individuals somehow colluded in a conspiracy to cover up a crime. These were not casual acquaintances whom the McCanns met on holiday but friends and associates who chose to go on holiday abroad together. They are therefore not independent of each other nor can they be designated as independent witnesses.
Hmmm would you class someone like Jayne Tanner as a friend or associate? Until this holday she had only met the McCanns half a dozen times over a period of 4 years and never on a one to one basis - but just as guests at the same birthday parties and weddings etc. She was Fiona Paynes friend.
I believe she did say she was getting to know Kate on this holiday because they took their tennis lessons together - but she also said words to the effect that although Gerry was fine - he was not quite her cup of tea.
I don't think I would describe a 'friend of a friend' as a 'friend of mine'.
Also wasn't there another couple (can't remember who at the moment) - who had not seen the McCanns for 3 years before this holiday?