A couple of thoughts
Setting the charges so they only affect rush hour is certainly interesting (I'm not saying I agree with it - just that it's interesting). It would be a good incentive to move the working day round to avoid these times, which I suppose is sort-of the idea.
As for "paying a deposit for an electronic tag" - well, how does this work then if you're only passing through? If you live and work in Manchester then you'll have an opportunity to get one of these, but what do you do otherwise? Request one and then wait until it arrives in the post before you set off?


