Great upload! Been walking these walls most of my life. Looks like some time around late May - early June to me. One somehow notices more from this vantage point.
This is one of my favorite walks, it's a quick easy amble my favorite spot on the walk is at 16.57 - 17.03 where you can see road, rail and canal while stood on a Roman Wall. Not the most dramatic of views but it has so many layers.
Same here, interesting views in every direction at that point. Least favourite part of this walk is crossing the busy main road just past the racecourse. A pleasant and interesting 45-minute stroll regardless.