That's low for 18's, so I couldn't say.
I've used Nexen and Khumo on the Jeep that's got 18" wheels, but they're about £125 per corner Inc fitting.
I've currently got Zeta's on the Freelander which are very good for the price, but that's 16".
I've just noticed your in Sheffield, just down the road. I always go to AP tyres in Rawmarsh Rotherham,used them for over 20 years, very competitive and never give bad advice. They do look like they'll nick your car, but they're good blokes.
Give them a ring, the advice is free and they beat most website for prices. They usually quote inclusive of fitting.
Mike