Hi Foz
The priority for the assessment service is always going to be for the safety of their staff. If you can get your GP to back you up, then need to write a letter saying that you are unable to be assessed at all and need a paper-based assessment or you need one carried out in your home. If it is a home visit the doctor needs to add a sentence that you do not display any violence in a place that is familiar to you.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems