Its pretty normal for your renewal quote to go up regardless of whether you have had a claim .
I've just renewed mine with adrian flux . The initial quote was £595 ,baring in mind i haven't had any claims . I rang round also on the net and got a better quote of £435 from privilege so flux beat andi ended up paying £430 .Just phone lots of other insurance companys , go on the net and i'm pretty sure you'll get a better quote .The AA hav always quoted me silly prices on the 172 and now my 182 .