Yeah I can understand! Your 17 with 0NCB right Idrees? Even with that, 2.5k is MAD! Especially for a 1.3 NA. I guess they assume the SR model is quicker, but still. Try putting your parents on the policy (so long as they have a semi-clean license lol) and see if it brings it down at all! Its insane, at 18 with 1NCB I managed to get insured fully comp on a GT for £1400! Madness...
Don't try and put your mum as the policy holder and you as an additional driver, it'll still be stupidly high ! Try it the other way round - you as policy holder and your mum as an additional driver.