The equity release clause is usually enacted at month 54, but can be at month 66, according to what is specified in the actual proposal or Chairman's Report of the initial creditors meeting......
The standard proposal put forward is usually 60 months, so the release clause triggers at month 54. I see your clients IVA's were 72 months ---- this could have been proposed as 72, in which case the release clause could have been agreed in the proposal as at month 66. Or, it could have been amended to 72 by creditors at the meeting, in which case the release will still be at month 54, unless altered in the Chairman's Report.
All that said, assuming these are Protocol IVA's, the Covid Guidance would currently apply : https://www.gov.uk/government/publicati ... a-protocol
and, so, the 12 month extension would be added, rather than equity release --- if there is, indeed, enough equity to trigger the clause anyway.