I found in the Dutch newspaper Volkskrant a referral to an article by the columnist Gove in the Sunday Times in 1999,
Sophie received $ 410.000 from BMW in order to promote their Rover 75 car and posed next to the car at a car show in Frankfurt (can not find the original article). That would go a way towards creditors
Pr-stunt Sophie - Archief - de Volkskrant
The Sunday Times Mirror Magazine Section