Constitutional reform act of 2005 - supreme court has been granted a greater separation of pwoers mainly by abolishing the lord chancellor's position.
The appointment of the JAC underpins values of impartiality and interdependency. Rulings hold a democratic mandate, decisions are free from political control and thus hold no bias. Furthermore, the security of tenure ensures that judges hold their role for life, they do not live out of fear and can act on their own accord.
For example, the Lord chief justice Phillips strongly criticised the wider use of mandatory sentences, demonstrating judicial independence.
The Kilmuir guidelines no longer stand, and judges are consistently entering the political fray. There has also been an ongoing process of demystification, accompanying this power separation with a clear physical gap.