The original shareholders must remain on the Memo & Arts (M&A) even though you are amending the M&A. This information is never altered. The current shareholding is always noted on the Annual Returns.
No need for copies of minutes.
As for the text of the special resolution - Keep it simple. ie; On (insert date), at a general meeting of the company, duly convened at (insert location), it was resolved to change the name of the company to (insert new company name in full).
The form G1Q is a special resolution form and does not require you to attach the resolution as well, as it is contained on the form itself.