“…would not be appropriate to embark upon an investigation into whether the old common law rule as to the unlawfulness of CFAs (derived from Wallersteiner v Muir [1975] 1 QB 373 and Awwad v Geraghty & Co [2001] QB 570) survived the amendments which came into force in 2000 (paragraph 2 above), or whether it is now more appropriate to ca…”