Your reviewer has lived in the environs of St John’s Wood all his adult life. He has walked past Oslo Court many times. It’s an imposing Grade II listed block of flats opposite Regent’s Park. Prior to this week he had never entered. Inside sits an eponymous restaurant that has been open for over 40 years. Step inside and it is as if the clock were wound back. You’re happily in the early 1980s, albeit now paying 2023 prices.