I'm just back from a weekend in the Cotwolds, we did two road based day rides (and a days walking). Loads of very pretty country lanes to cycle on and quite easy to avoid to heavy traffic main roads. Obviously its quite hilly in places, but some canny route planning and skirting to the edges of the main hilly areas can keep the elevation profile reasonably sensible. Loads of good cafes pubs etc to stop off for coffee lunch etc if that's your thing, and not too far from brizzle.