That's something, I suppose

In response to Lord Stoddart's written question about the euro and a possible referendum, HMG said:

The Government's policy on membership of the single currency remains unchanged. As stated by the previous Chancellor in October 1997, “whenever this issue arises, under this Government there will be a referendum. Government, Parliament and the people must all agree”.

Not sure what those last four words mean. The people are unlikely all to agree. So, if there is merely a sizeable majority, will there be another referendum in order to achieve a unanimity? And what happens if HMG decides that the euro is a very different euro from the original?