Thank you all, very useful to hear others advice from the industry. I have considered free-swing doors but as Tom says, in most of the purpose-built blocks there is no fire alarm system. And if there is I'm asking why!
I did have a report that one 95 year old lady couldn't open her flat front door even with a cam action closer, which raises other questions that I don't have control over. Perhaps suitable adjustment is key in this situation.
Thank you Neil for comments re fire doors. I'm trying to find a risk appropriate solution that doesn't place too much financial burden on Leaseholders but considering the events of 2017 perhaps it's time that the gold standard is sought.
Thanks again