Clause 24 of our service agreement:
If we are informed that you have contacted relevant authorities directly, without us advising you to do so, or you decide to act on your own behalf we will cease to act in your case.
Most agents refuse to do this, I know of a couple whose terms and conditions say if you do this you have effectively terminated your agreement with them for representation.
So be careful before running straight to do this, talk to your agent first. Be ready to explain why you feel you don't trust them enough and so you want to be able to spy on their progress.
Not exactly a trusting professional relationship