Speaking in code not a thing either.
The way it has been done since the dawn of time...
Some examples, because fun:
this patio smells of elderberries < communications are compromised
i ran into this norwegian guy < our informer is dead
the dog ate my homework < we've lost access to the information
mother hasn't been well < Theresa May is still up to no good
grandma has a temper < oh look it's the queen chiming in
mom gave me a biscuit < i acquired sensitive information from my informant who works for the government
mom baked a cake < incoming police raid
mom baked an apple pie < incoming drone strike
mom baked a pumpkin pie < they're sending in US black ops
mom baked a maple pecan pie < they're sending in the Mounties
mom baked waffles < they're sending in the Belgians
mom baked brownies < enemy forces are high
the neighbour is mowing the lawn: Russia is conducting military operations near our territory
the neighbours are out for the weekend < Putin's western front is weak so now would be a good time to invade Russia
we're having a picnick < invade Russia
there are birds sitting on the laundry line < reg hacks are commenting on our invasive policies
We could do this all day, having the spooks nod off to bedtime stories while we take over the world...
To wrap it up, of course the entire policy and every official statement about it is code for:
"We don't care for, trust, or respect the population at large and are terrified of what might be up to because of our guilty conscience, therefore we must observe, control, manipulate and disable people as needed to stop them from interfering with our bid for absolute power, yet they're not allowed to know any of this."