"I had no intention of using this but I'm now a bit worried that I might come under some pressure to as it fairly clearly says I can, and work might be a lot less understanding about paying me to do less than my full job if they see it as a choice."
Exactly this.
Arguably I am on the list because I work for Citizens Advice and my employer has said that we are "charities and workers delivering key frontline services". However, I am not convinced that it's a "key frontline service" compared to some of the other roles on the list which are much more essential IMO.
Also, I'm "vulnerable" because I'm pregnant, so I'm working from home and avoiding social contact. But what is the point of me being under house arrest if my DS is going to attend nursery and risk catching coronavirus from (for example) NHS workers' children who are also still going to nursery and are presumably going to be a high risk of catching it from their parents?!
I asked my employer if I could take parental leave but they didn't reply and have instead emailed everyone to say we are key workers.
Like many others I am by far the lower earner. My DH is not a key worker but he is self employed (doesn't get paid if he doesn't work) and his income pays our bills. So it would be financial madness for him to do childcare while I work.