Dd did these sat's 11 yrs ago and I do not remember this level of pressure then.
There wasn't the level of pressure 11 years ago. Now schools (and individual teachers) are under immense pressure to ensure every child reaches their 'target' level.
Naturally, that pressure is then passed onto the pupils and parents.
It's an inevitable result of the target-driven approach to managing schools by government and managing teachers by their HTs.
This is part of the reason why I left the profession.