Steven
It's up to you!
Not sending additional evidence may hasten the MR process, although there is no guarantee of this, especially as we head into the holiday period.
Whilst MR revision rates are low, they do happen so you need to consider how much difference this evidence might make to you overturning the current Decision, members are reporting that they have waited for the best part of six months for an appeal hearing.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems