Arguably Gordon Brown's most successful policy was designed while waiting for office, and implemented as a coup over Labour's first weekend: the independence of the Bank of England.
As he waits for the possibility of taking over as Prime Minister, he may well be wondering how he might similarly create an immediate and lasting impact in his first week in the highest office.
One option for Gordon to consider is the abolition of the royal prerogative. The royal prerogative gives extensive, and unaccountable power to the executive. The government of the day, especially the Prime Minister, exercises enormous patronage and considerable power in its name. These powers enable the executive to appoint and dismiss ministers, dissolve parliament, grant clemency and pardons, award honours, declare war, declare a state of emergency, sign treaties, issue passports, deport foreign nationals, create universities, designate cities, and to make thousands of appointments. All these powers are exercised with no legislative oversight or control.
The legitimate authority for these decisions should reside in Parliament, which could choose whether and how to delegate decisions to the excecutive, and how the executive would be held to account for the exercise of those powers.
Such a move would be popular with Labour's back-benchers, who want Parliament to determine whether the Government should declare war. It would be be modernising and forward looking. Opposition would come from only a very narrow group, easily portrayed as reactionary. Many traditionalists might see it as a necessary step towards the preservation of the monarchy.
Of course, he may not have waited so long and fought so hard to reach the top job only to give many of its powers away.