The single most important rule: never use a pressure-fit gate at the top of a staircase. Pressure-fit gates rely on tension against the frame and can be dislodged with enough force — fine for doorways or the bottom of stairs, genuinely unsafe at the top.
Screw-fit gates attach permanently into the wall or door frame and are the correct choice for the top of any staircase, since they can’t be pushed loose the way a pressure-fit gate can.
Callowesse Air2 Retractable Stair Gate 0-150cm - Grey
£59.99
Check the gate is rated for the specific gap width you have, and look for one with a genuinely one-handed adult opening mechanism — you’ll be operating it constantly, often while carrying something.