Silverstone travel plans help needed

Hello guys, im due to go to Silverstone to watch F1 this year and since i bough my ticket things have changed. I was going by motorbike but sold it a month later, was gonna get a lift as far as poss then cycle the rest of the way, was hoping something less that 5 miles but realise it could have been 10 miles. now i have been informed that plan wont do as my girlfriend wont drive my car with cycle carrier. so whats my best plan now of how to get there? ill be coming in from the south side thats all i know.