ravenscroft

I have a Section 104 Holding and a few days ago made several disposals totalling 50% of the holding. If within 30 days I repurchase half of those sold I understand that the gain for CGT on these will be calculated using the recent sale cost as the acquisition cost. My question is....how do I then calculate the acquisition cost of my overall holding (ie the original 104 holding shares I retained together with the repurchased shares) Thanks

It is well understood that any investment sold from within an Investment ISA is free of CGT and that any such capital gains are not required to be reported. However, I hold shares in a particular company in both a general investment account and an ISA. Am I correct in believing that the acquisition cost of my ISA shares should also be ignored when calculating overall acquisition cost of a Section 104 holding?