As Vlad says, it’ll be 18 for a GIA.
In terms of JISAs, it is not something we have heard overwhelming demand for, and so while it is on our roadmap we don’t see it as a priority at the moment. Although as with anything it would be great to hear from our community on this, and if it has the demand we can look to accelerate it.
ISAs on the other hand are right at the top of our list. We expect to enable them in our backend in a matter of weeks, and @Freetrade_Team_Design is hard at work on the UX for it. We want to make sure it is intuitive to use, and in particular that we make it easy to switch between accounts, buy into the correct account and see useful information in aggregate or by account. More to come on this soon!