Those assisted by the government-assisted local community legal service and their pro bono lawyers went a different route: FOS sent their letters onto Amex whilst the FOS went thru its processes of opening a file and sending out an Authority form. It seemed to work very effficiently. But those linear thinkers who waited can't access the law firms' now-concluded summer clerk program or get bonii in time for V's promo.
Nice that it worked for you vet, but I reckon that community pro bono lawyers have better things to worry about than your inability to enter promos and competitions. I personally would be embarrassed to call a community lawyer over such a trivial matter, especially one with such a well established "'linear" path. YM obviously do V.