@southlondonlass I'm sorry but I've lost track of the timescale and investigations you have had because you have posted on 3 different threads about this.
Maybe if you start again here, we can help?
The normal process with erratic bleeding at 56(presumably still not post menopause) is:
1 See GP. They refer you under the 2-week rule for a scan and usually a hysteroscopy with a consultant.
OR
2 A scan and if all looks normal they might not do a hysteroscopy.
I think you said in a previous thread you'd had a scan (not sure when?) and it was normal.
Have you now had another scan privately? Who did this? Did you self refer to a gynaecologist who set this up, or did you go to a 'walk in' scanning centre?
If it was the latter, who looked at the scan and what did they say? Is there a written report?
I think your best step is to go back to your GP, express your worries and ask for another scan (if you want to go privately your GP will refer you.)
If this consultant you saw who is suggesting an MRI is being ethical, they ought not to be suggesting treatment you don't need.
An mri scan is not part of investigations for odd bleeding. The normal process is a hysteroscopy.