I have a friend who purchased a Fiat Doblo which had already been adapted into a WAV. The modification included a lowered fuel tank which now protrudes c.3inches below the visible body and, when driving it, she regularly grounds on speed bumps. She has already cracked the tank and had it repaired. This doesn't seem safe to me as the fuel tank is fully exposed to any object on the ground. Neither the dvla or the mot checks seem to anticipate anyone would expose a fuel tank this way, they merely suggest that "unsafe" modifications may be illegal. What are your thoughts on this?