Thanks to all for the feedback. In this particular case I'm 99% sure the closed records are the three children (including my late father). They would all be at school, so no great interest in occupations etc. Was just concerned at the fact that 2 of the 3 records should have been open, and whether this is indicative of the accuracy of the register as of 1991. Both deaths occurred in England, one at home, one in hospital, full deaths certs issued in both cases.