Ian
North Norfolk (where I live) is renowned for its poppies (it used to be known as Poppyland, after all), although with all the rain we've been having they aren't as spectacular as they were last year.
I've seen some decent poppy shows around Kelling village and assume they will be more elsewhere (normally are). But this is Norfolk, mind, so we're talking slopes rather than hills.
Best bet is simply to drive around anywhere between Cromer and Cley (ish) and 10 miles inland and see what's what. They're always best in the morning - more so this year, since they tend to be battered to pieces by rain come lunchtime.
If I see any particularly nice examples I can let you know where they are
You might also find this (Norfolk Wildlife Trust's Poppy Survey) useful:
http://www.norfolkwildlifetrust.org.uk/home/PoppySurvey.htmRgds
David Bosdet
http://www.sedasoft.com/gallery/