Work has already gone
As many decisions now no longer include the UK the tap has already been turned off. The damage from this is nicely deferred though as space missions take so long to design, procure, and operate.
The deferral of this damage will not be apparent to those constantly poring over this year's trading data as existing commitments still have to be completed.
This is the same as choosing not to plant next years crops, while the minister says you will have plenty of food on your table today.
Biting the hand that feeds IT
