Very good points raised there which many do not consider.
According to the calculator I am now over £300 better off this year so sorry won't be signing the petition. I'm sure most Londoners are in the same boat.
I would not consider myself particularly wealthy (by London standards) hell its expensive living here
If truth be told over recent history its always the higher earners that have been taxed more, for once in a blue moon higher earners are given a break and its front page news - and everyone is up in arms about it.
On a political level it wont be good for Labour who are penalising the people who historically they have represented most - so the best thing those that are not happy can do is rather than sign a petition is to vote them out!!