What do you think of this follow up letter? Might it cause more trouble?
Dear XXX
I hope you are well. It was good to catch up on the phone yesterday.
As I explained, I had multiple complaints about noise and nuisance from your flat (ADDRESS) this weekend. When we spoke about a similar matter in 26 September this year you assured me that it would not happen again. On both occasions you were playing loud music in the early hours of the morning and had guests in the common areas causing a disturbance.
You have once again assured me that you will not cause any disturbance to the neighbours and I trust that you will not.
However, if I do have any other similar complaints I intend to terminate the assured shorthold tenancy agreement using a section 8 notice. This will require you to vacate the property with as little as two-weeks notice.
Please reply to this email to confirm you have read and understood.
All the best