Each time Prime Minister Theresa May makes a move over Britain’s looming departure from the European Union, she upsets someone within her fractured Conservative Party.

But with that withdrawal a little over a year away, silence is no longer an option, and on Wednesday it was the turn of hard-line supporters of withdrawal to be disappointed when a government paper appeared to suggest that the transition period after Brexit could be longer than two years.

The two-year time frame has been cited as the period necessary to protect the economy immediately after withdrawal, or Brexit, which is scheduled for March 2019. Brexit supporters fear that extending it could lock Britain into the European Union’s economic architecture for years to come.

The government paper said the transition’s duration should be determined “simply by how long it will take” to prepare new systems. It noted that this “points to a period of around two years,” but also suggested further discussion about the end date.