I know this is a very late response to this question but i myself am in a similar situation.
I'm 18 years old and passed my test on September 8th of this year. I have been on my mum's insurance for her car every so often but feel the use is too restricted for the money I’m paying for the insurance.
I have been looking around at Peugeot 106's myself but i still seem to be getting insurance quotes a lot higher than £2500 mine are usually around £4000 but i think this is down to where i live as i have a Liverpool postcode, so some insurers won't even insure people in my area let alone a new driver.
I have found that putting my mum as a second driver lowers the cost by a few hundred pounds, and looking at newer insurance companies that aren't in the "big few."
I stumbled across a web based insurance company that offers many different options and caters especially for young drivers...
http://www.youngmarmalade.co.uk/
Yet again though this company won't insure me because of my location.
I find the prices of insurance for young drivers to be preposterous, how are young drivers meant to gain experience of driving if they are denied insurance because they can't afford a large sum of money. I see this type of thing on a day to day basis as well when it comes to jobs asking for experience how are people meant to gain experience if no one gives them a chance.
I guess it’s just a case of shopping around to try and get it cheap.