Interest rate swaps: a short introduction (irwinmitchell.com)
See also:
collyerbristow.com/longer-reads/explaining-the-italian-swaps-claims/
Update:
hsfnotes.com/bankinglitigation/2024/01/18/court-of-appeal-overturns-high-courts-high-profile-italian-swaps-decision/#page=1
www.mayerbrown.com/en/insights/publications/2024/02/uk-court-of-appeal-overturns-judgment-in-latest-italian-swaps-decision-concerning-corporate-capacity