There will only be 55 RHD examples for the UK & Ireland market. I’d say it will be a case that you will have to be invited to buy one, just like a limited edition Ferrari or Rolex. BMW will be asking for evidence that the prospective owners have a long history of BMW M purchases through their dealer network.
55 slots would be easy to fill with cash ready buyers from London on its own never mind the whole of the UK and Ireland. Many will definitely end up in cosy garages for sure as a result and others will end up being sold onwards for above “sticker price”.