So this thread has made me check birth certificates against passports
Mine says Hammersmith on birth certificate and London on passport (Hammersmith hospital)
Husband's says Lambeth on BC and London on passport (St Thomas')
Similarly 1st child has Westminster on birth certificate and London on passport ( St Mary's hospital)
2nd child has Kingston Upon Thames on both BC and passport (Kingston hospital)
not sure now why others say their passports say Chelsea or Lambeth now and it's annoying me!