The Bideford Amateur Athletic Club website says:
The Bideford Half Marathon is held in March each year over a virtually level course.
This message is reiterated in the pre-race bumph, which reads:
Apart from one section, the course is largely on the level.
Hmmmm. That would be the section from Mile 2 to Mile 7 then, would it?
Granted, I wouldn’t describe this course as hilly, but I think that undulating would be a fair assessment. An undulating course with stunning views, encouraging marshals and a rather fine tunnel to mark the point at which you have only a parkrun to go.
I loved it, and would heartily recommend it to you, especially if it comes as part of a long weekend in the company of Run Or Go Crazy and her indescribably hospitable family, and with a side order of Janathoner company.
And I’m not just saying that because I managed a sub-2hr PB 😉
abradypus 
I think flat means ‘not too hilly’ and to get really flat you need the magic words ‘pancake flat’.
Very well done on your sub 2hr and on an undulating course too – woohoo!
Amazing performance.
It was PBs all round this weekend! Well done.
absolutely brilliant!
Woo woo!! Well done!! (Does new PB dance!) P.s. don’t believe anyone from Devon when they say something is flat. They don’t mean ‘flat’ in the normal sense… (Voice of experience!!)
Well done on getting sub-2hr!! 🙂