How to open and close quinny buzz pushchairs - Quinny Buzz Three Wheel Stroller

If you lock the front wheel and lower the handle bar to the lowest postition first, this will make the chassis as small as it can be. Remove the seat/car seat or carry cot if this is on the chassis.
Then, stand in front of the chassis, with the front wheel between your legs.
Push down the grey rectangle button on the left hand side, then pull toward you the right hand rectangular button then push this button downwards,
Then, withnthe two buttons still pushed in, with your full body weight, push the chassis downwards the floor until fully folded.

I hope this helps.