I went to GP and referred on the 2WW, my consultant after examination advised me that I was to have a mammogram and ultrasound, which was done at the same appointment. He also advised that he was going to request a MRI and would receive an appointment in a few weeks. 
After mammogram and US on the day I didn’t go back to the consultant, but was told by the doctor that performed the US that all ok and I would receive appointment for MRI. 
I received a call the following morning a Friday to confirm an appointment for the MRI on the Tuesday of the following week. 
I have an app that informs me of any appointments, test results etc.

I have received a follow up appointment with my consultant which is scheduled 5 weeks away and requested future testing ordered by my consultant but no further details. 
No results are available in regards to the MRI in my app.
Why was an MRI performed ? I’ve looked for information from various sources and read that it is not normal practice for an MRI?