I hope you'll find the following links useful. In particular, it's important that you use links to the various consultations that have been set up. Whether or not I agree with you, it's important that people make their views known.
"Hammersmith Bridge closure" page on LBRUT's website
"Hammersmith Bridge being restored to its Victorian splendour" on LBHF website
Transport for London's consultation page
Transport for London's status update page
Finally, my Twitter link.