Deffo shop around a bit.
Age 17 - just passed test - mk2 1.6 - car value: £300 - Insurance Price - £1800 with LV.com
Age 18 - Driving 1 year (1 year NCB) - Mk3 2.0 16v GTI - car value: £1600 - Insurance Price £1400 with bell.co.uk
Age 19 - Driving 2 years (2 years NCB) - Audi A3 2.0 tdi - car value: £8000 - Insurance Price £1055 with endsleigh.co.uk
It will go down, and it all depends on the area you live etc.. but if you shop around you can get it down
Mine has gone down every year so far despite the cars getting quicker or higher in value each time around.