Looking at previous guidance, 6 weeks before the election looks to be about the norm - so 26th March looks about right - which is 4 days before Parliament dissolves (which is now fixed by section 3 Fixed Term Parliaments Act 2011 as amended in 2013 by the Electoral Registration and Administration Act 2013)...so we have 9 weeks to go.......
Government activity between the start of an election period and polling day
2.28 In the period immediately preceding an election, the Cabinet Office publishes guidance on activities in the run up to polling day.
The Prime Minister writes to ministers in similar terms.
During this period, the government retains its responsibility to govern, ministers remain
in charge of their departments and essential business is carried on.24 Ministers continue
in office and it is customary for them to observe discretion in initiating any action
of a continuing or long-term character. This means the deferral of activity such
as: taking or announcing major policy decisions; entering into large/contentious
procurement contracts or significant longterm commitments; and making some
senior public appointments and approving Senior Civil Service appointments, provided
that such postponement would not be detrimental to the national interest or
wasteful of public money. If decisions cannot wait they may be handled by
temporary arrangements or following relevant consultation with the Opposition.
During this period, the government retains its responsibility to govern, ministers remain
in charge of their departments and essential business is carried on.24 Ministers continue
in office and it is customary for them to observe discretion in initiating any action
of a continuing or long-term character. This means the deferral of activity such
as: taking or announcing major policy decisions; entering into large/contentious
procurement contracts or significant longterm commitments; and making some
senior public appointments and approving Senior Civil Service appointments, provided
that such postponement would not be detrimental to the national interest or
wasteful of public money. If decisions cannot wait they may be handled by
temporary arrangements or following relevant consultation with the Opposition.