Check A5 road name north of here. The business to the East of the road here claims to be at 4-6 High Street and the lamp post number at this position is number 1. Adjacent businesses are in the same numbering sequence, ascending northwards. I suspect High Street Edgware extends much further south along the A5 than currently mapped.

This is tagged as a roundabout, but surely the Hangar Lane Gyratory system is the classic example of a traffic circle; see osm.wiki/Traffic_circle#Possible_misinterpretations

There is a public path, crossing the river, missing somewhere near here. West end is probably on the bend of the un-named way/59719383 (OS Locator is currently down, and it is unknown to musical chairs) so I'd have to search it in the main OS Locator database).

Unfortunately, I was unable to stop to survey it accurately.

As well as the large hotel on the other side of Northwick Park Road, there is a smaller hotel near here, but I can't match it to a specific building based on local knowledge and Bing, so it needs a survey.

There is an End of Home Zone sign about here, but nothing nearby is tagged as highway=living_street.

Needs survey. Whilst doing so, also add/verify local street names.

Unfortunately I was unable to stop at the time I spotted this.