Ailsa, I have done this a couple of times - the first time as a new runner I found it very undulating, the second time I wondered where all the hills had gone! It's not flat but it's pretty and if like me you're local then it's a nice one to do , well organised with friendly marshalling. It's also my 10K PB course - a woeful 50:03 set the day after a wedding with a terrible hangover!
John - you did an amazing time! - after a 2 hour walk around Turville with 16 kids and 3 dogs followed by a long pub lunch/dinner I'm not sure whether you'll see me tomorrow morning! Just off to watch Bridget Jones diary!