ONS admits they don't have the data for accurate assessment of vaccine safety

A mouse has just alerted us to this response (dated 11 Feb 2022) by the Office for National Statistics (ONS) to an FOI request asking:

I want to know how many pregnant women end up in ICU each year starting from the year 2015 to dec 2021 and how many resulting in deaths and discharges?

And then second chart or table split into vaccinated and unvaccinated …