Your accountant is right. More specifically its leasing. Its basically getting into a lot of debt on the basis that the cars you hire, effectively will be guaranteed rental EVERY week.
Have a few cars on your drive and you become a rental company.
Without getting too into it the 'asians' are the main culprits of this.
You accountant should have also told you that a lot of this money is from illegal earnings as well.
You are right about the mobile phone issue too....but they have to be seen as gangster, 'innit'?!