Would it be worth emailing the CHC to raise the concern that not enough time is being allowed to gather all the relevant evidence of your mums needs from those involved with her health and social care and that you feel it will negatively impact on your mum receiving a full, fair and proper MDT. They may well come back and say it will be months before another MDT can be arranged so like it or lump it, but at least you will have your concerns and their response in writing should you need to appeal at a later stage.