The upright rod will extend but will not release to access hose

The upright rod will extend but will not release to lean back and give access to the hose.

Called Dyson support but after waiting for the representative to give me some information, the only answer was to take the machine to a repair shop.

Cannot squeeze the red circular lever to release the rod.  Cannot see where I can remove screws or any other hardware to open and look for the problem.