"Obviously we don't know the reason for the previous sections "
Elective as her first birth had been difficult.
Its not relevant what her reasons were. Its not something you should have to 'justify'. EVER
However, if you are granted an ELCS for mental health or traumatic birth it should be stated that the number of children you intend to have should be discussed with you.
This isn't actually one of the key points on 'maternal request' CS (and I think the term is flawed as its grossly misleading) in the NICE guidelines. The statistics on risk in the NICE document are also slightly misleading as they are for first time mothers only, and the cavet about the risks increasing for subsequent pregnancies are definitely not stressed enough.
(This is one of the reasons why women over 35 tend to be 'allowed' ELCS more readily than younger women, which distorts the figures and feeds the 'too posh to push' nonsense. They are less likely to have more children because of their age and their age is an increased risk in the first place)
Its not mentioned often enough in threads on MN where women have had a traumatic birth. ELCS are readily suggested without also saying what else you should be aware of, so I do think there is either a lack of proper awareness or a cultural expectation (that seeps over to HCPs) that you will only have a certain number of children.
Having 8 children - by any method - is not the norm in the UK.