PM Accepts Treaty Change Delay

British Prime Minister David Cameron has accepted it may not be possible to change the EU's treaties before the UK's in/out referendum on the EU. Cameron has argued instead for an "irreversible lock" and "legally binding" guarantees that EU law will at some point in the future be changed to accommodate Britain's aims.
As recently as January he said he would be demanding "proper, full-on treaty change".
Downing Street insists, however, that it is simply a reflection of the fact that any treaty change will require a time consuming ratification process in 28 different countries involving parliamentary votes as well as referendums in France, Ireland and Denmark.