"There are numerous examples of proxy proposals that combine multiple changes to a single corporate document, including elimination of the 'blank check' authority to issue preferred stock, " Apple stated.

CNN: Apple claims Einhorn holding investors hostage

Mr Alexander, who was a spokesman for the now defunct Britain in Europe lobby group before becoming an MP in 2005, rejects the "blank cheque" argument, saying the pre-manifesto document is merely part of the normal process the party goes through every time it produces a manifesto.

BBC: Manifesto Man: Danny Alexander