Everything went fine when I signed up for a motorcycle insurance. I signed up via a comparison website and one of the questions was if I had any NCD for any motor vehicle, I did, on a car. So I signed up for a cost of £184.81 (not the cheapest btw, but I thought they would be good because of the rating).
They contacted (Donna and Jemma) me stating that my NCD was for a car and not for a motorcycle, I sent a screenshot of the form print stating motor vehicle. They didn't care as according to them the question is correctly formulated, and wanted an additional £132.29. I consider this highly excessive considering a subsequent search for insurance with 0 NCD resulted in only an excess of £41.95 with the same insurer (Not to mention that they're still not the cheapest).
They then unilaterally cancelled my insurance.