The above post by ffxssj confirms the SPP can be closed off...

The above post by ffxssj confirms the SPP can be closed off early at Directors discretion. An early close off did happen with an SPP by another company I subscribed to earlier this year when it became apparent the SPP was going to be way way oversubscribed. To be honest I can't off the top of my head remember the company's name as I subscribed to quite a number of SPPs this year , and those that got in before the early cut-off were also scaled back, as was I. Anyway, just sayin' it can happen although admittedly its not a commonplace.