My home and contents insurance is up for renewal at the end of the month. It's gone up £70 on last year. £390 is this years figure. I done comparison sites and they're coming in about the same.
I just had a play on Money Supermarket and it came in around £300 average (starting from £190). Ours last year was £310 I think.
I need to tweak it re some high value items (bike & jewellery) when the renewal comes through next month. But hopefully it will come in at around your price.
For reference we have 9 years NC, house value doesn't seem to matter these days, roughly £50k content, not a subsidence or flood risk area, brick built, tiled roof detached bungalow in rural low crime area.