You asked
I've seen that the 61 Councils listed below had no infant mortality rate shown in the 2018 set and would be grateful if you released the data.
Eden, Fylde, Ribble Valley, Hambleton, Richmondshire, Ryedale, Rutland, Bolsover, Derbyshire Dales, North East Derbyshire, Blaby, Hinckley and Bosworth, Oadby and Wigston, Boston, North Kesteven
South Holland, South Kesteven, West Lindsey, Corby, Wellingborough, South Staffordshire, Staffordshire Moorlands, Stratford-on-Avon, Malvern Hills, Wyre Forest, Brentwood, Castle Point, Rochford, Dacorum, North Norfolk, Norwich, Babergh, Mid Suffolk, City of London, Windsor and Maidenhead, South Bucks, Test Valley, Ashford, Sevenoaks, Cherwell, South Oxfordshire, West Oxfordshire, Elmbridge, Mole Valley, Surrey Heath, Adur, East Devon, Mid Devon, North Devon, South Hams, Torridge, West Devon, Cheltenham, Cotswold, Forest of Dean, Isle of Anglesey, Denbighshire, Ceredigion, Merthyr Tydfil, Blaenau Gwent and Monmouthshire.
We said
Thank you for your request for data on infant mortality rates for the specified 61 Councils. The dataset you refer to where the infant mortality rates are unavailable for these areas is Table 2 of Deaths registered in England and Wales, 2018. For these Councils there were fewer than three infant deaths registered in 2018. It is ONS policy not to calculate mortality rates where there are fewer than three deaths in a cell, on grounds of statistical quality. Rates based on such low numbers are susceptible to random fluctuation from year to year and inaccurate interpretation.
Rates that are based on between 3 and 19 deaths are displayed in tables but are denoted (u) as a warning to the user that their reliability as a measure may be affected by the small number of events.
Since the published tables include the actual counts of births and deaths, you are able to calculate infant mortality rates for those Councils yourself, if you so wish, without us providing any additional information.