I can't understand this fraud - surely getting something delivered to your door is the silliest way to defraud something? Also what are they doing with the £100s of takeaway food they are ordering? I must be missing something here.
Maybe the restaurant is part of the scam, and the food is never prepared? Still it would remain extremely easy to trace the fraudsters.
If that's not the case you can't resell takeaway food, so no easy way to turn it into cash.