I'm absolutely fuming

Up to now my premium was £1080 with 5 years NCD, 3 points (SP30) and following mods declared;
Exhaust
Uprated brakes
Aftermarket wheels
Unfortulately earlier this year I 'tapped' the rear bumper of of another vehicle with the wifes car who decided to make a lane change last minute without indicating

anyway, i did not make any sort of claim as there was no damage to either vehicle.
Just recieved my renewal who now want more than double for this years premium £2350 WTF!!!!!!

Reason for this i have been told is due to the claim and general increase in premium.
I have done a quick insurance search on a couple of comparison sites and am getting crazy quotes even above my renewal, i just understand how 1 claim has made such a huge difference.
I'm wondering what sort of prices other londoners are paying especially those with a claim and points...