it won't be from Denham. I grew up in Ruislip Manor and was right under the visual circuit (towards the end of downwind right 25) from the age of 10. The queens Hawkers and even the 146 used to do circuits sometimes. I have no idea why, but they did it on a regular basis. I have flown into Northolt many times and on a few occasions they have let me do the same visual approach and I used my mums old house as a ref point for where to turn base. The islander that doesnt exist flies that circuit almost every day when the weather is nice. I've seen spits, typhoons, tornados, hercules, and all sorts of business jets do that circuit. I have flown it myself in citationjets, phenoms, a challenger and a global express. Long live Northolt - the day they make it into a housing estate is the day the planners have won..