What happens if you use no claims bonus on two cars?

What happens if you use no claims bonus on two cars in Australia and UK, you cannot use same no claims bonus on two cars simultaneously, as no-claims bonus is per driver and per policy, not per car, with each car needing its own no claims bonus earned separately, though some insurers offer mirrored no claims bonus or introductory discount 20% to 30% for second car, with using same bonus on two cars considered fraud with claim denied $10K to $50K and policy void. No-claims bonus, or no-claims discount NCD, is discount 20% to 60% for claim-free years attached to driver and policy, with 5 years no claims 50% discount $500 saving on $1,000 comprehensive premium, valid for one car and one policy at a time, you cannot use same 5 years bonus on two cars simultaneously to get 50% discount on both cars $500 each total $1,000 saving, as insurer checks central database Insurance Reference Services and CUE in UK, and if you claim same bonus on two cars, it is fraud with policy void and claim denied $10K to $50K. For example, you have car A with 5 years no claims 50% discount $500 premium, you buy car B second car, you cannot use same 5 years bonus for car B to get $500 premium, you start at 0 years 0% discount $1,000 for car B, unless insurer offers mirrored bonus or introductory discount 20% to 30% $200 to $300 saving for second car as loyalty, so car B premium $700 to $800 instead of $1,000. Some insurers like NRMA, Allianz allow mirrored no claims bonus for second car if you have 5+ years bonus on first car, giving 20% to 40% discount on second car. So you cannot use same no claims bonus on two cars simultaneously, each car needs separate bonus, with second car starting at 0% or introductory 20% to 30% mirrored discount, with using same bonus on two cars considered fraud with claim denied and policy void.