Thanks for the thought, Kev, but I'm actually a Surrey man now. About all the flying I've done in Norfolk has been in and out of Stik's strip and that of another mate at Burnham Thorpe (supposed to be there now, in fact, for our annual fly-in - damned weather!!!!). Holcomb Hall is near Burnham, and is nice to look at, but that's a bit of a treck from Old Buck and Seething.
I think Stik might provide more insight than I since he spends most of his time upside down over the interesting bits of that region.
Another thing to consider is that, if these friends and family are going for their first ever light airoplane ride, even 45 mins may be too much for those with queasy stomachs. I normally think more in terms of 20 mins for first timers, then a longer one later in the day if they're up for it. That gives you a chance to test their constitutions with minimal exposure to the effects if they aren't up to it.
Enjoy it and don't worry too much about what there is to see. If they've never been up before, just being in the air that low will be a mind-blowing experience and they'll either love it or hate it regardless of what you do.
Cheers
Pitts2112 - groundbound in sodden Surrey