Modern cars are easily written off by flood water.
Back a few years ago an acquaintance living by the Thames had 2 cars in a semi basement garage, invaded by the Thames, that he couldn't get out in time.
One, a 2 year old Mercedes, I think a SLK, was written off because water got into all the electronic modules inside the car.
The other, a S2 E Type was also flooded. It needed 2 new silencers, which were glass packed and saturated, plus new carpets. It was not written off.
The Insurers required the Merc crushed.
I suspect Hammonds car was crushed by the insurers as a total loss.