Seems to be this:
BabyDan Beechwood Flexifit Baby Safety Gate
https://www.johnlewis.com/babydan-beechwood-flexifit-baby-safety-gate-fsc-c...
came with the house, some of the hinges are missing
BabyDan FlexiFit Baby Safety Gate (Harmonstown)
This offer has been gifted to someone and is no longer available.