One aspect of the Damian Green case which has been overlooked is the effect this has on his ability to represent his constituents and take up cases on their behalf. All his computers have been seized, along with his mobile telephone and home phone lines. In effect, he has no the ability to communicate with the outside world from his constituency home in Ashford. Indeed, he has asked people to send him their phone numbers and contact details via his Facebook page.
Having worked for an MP doing constituency casework (OK, it was 21 years ago!) I know what kind of confidential problems constituents approach their MP with. Imagine you had written to Damian Green a few months ago with a complaint about the Police and he had taken it up for you. Imagine how you would feel this morning, knowing that in all likelihood some anonymous Detective inside Special Branch is at this moment trawling your correspondence on his hard disc.
Imagine you were a battered wife, seeking advice on how to get redress against your violent husband, who just happens to be a Police Officer. That correspondence would now be being read by a Police Officer.
Imagine you are a constituent wanting urgent help on an immigration case, or that your benefits have been miscalculated and you are urgently waiting for an answer. You won't be getting one very quickly...
Presumably Speaker Michael Martin thought about this when he gave the Police permission to enter Damian Green's office. This is why people across ALL parties are so concerned at what has happened. It's not Conservative v Labour. It's about Parliament v The State.