I have had a similar experience with MH. Upon purchasing my bike and my first year of insurance wef 01/04/2021 the premium was £238.34. For the subsequent period, i.e. wef 01/04/2022 MH’s quote was £354.23, (a 48% increase). MH did not offer any credible reason to justify such an increase. I am now insured with Lexham with a premium of £218.20.