Similar issues- I’m 30, swapped the policy from my e46 m3 onto my e92 m3. When I sold the e92 m3 and bought a runabout (320cd) worth about €1500, my policy doubled to €1800. I’m now trying to switch the policy back onto my e46 m3 and they’re refusing to do it as it no longer meets their risk appetite. Utterly ridiculous.