I have never heard of “Accelerant Insurance Ltd” of Malta (or indeed the UK). I have conducted some research online and cannot identify with certainty the company that has approached you and therefore do not know whether there are any fraud concerns surrounding this company. However, I agree that their approaching you does bear some hallmarks of a scam and therefore you are wise to seek legal advice.
It is a common scam that “investment gurus” approach pension holders and persuade them to pay all or a substantial proportion of their pensions on the spurious promise of increasing the value of their retirement pots, only to find that the investor was a fraudster who has used their savings to fund a lavish lifestyle.
For the time-being, I suggest that you consult your own pensions and investments providers and advisers for clarification as to whether this approach is genuine. It may be that Accelerant sent you a “mailshot” letter in error, but your pension adviser will be able to confirm the legitimacy of the approach.
If your pensions advisers have concerns, you should refer Accelerant to the UK’s Financial Conduct Authority who may be able to confirm whether your concerns are well-founded and publish a warning on their website to other innocent investors who have been approached by them. You may also report any attempt to defraud you to Action Fraud, which is the Met Police’s online and financial fraud investigation unit.
Under no circumstances should you transfer any of your pensions and investment pot to Accelerant until you are satisfied that they are a legitimate company and their request is genuine.