A flexible ISA supports the withdrawal and repayment of funds within a tax year, without impacting the ISA allowance. In my opinion, the fact that the Trading 212 ISA is not flexible is its only major weakness.
Unfortunately I need a flexible ISA for my upcoming contributions in the 2021/22 tax year, so I need to find an alternative provider.
Are there any ISAs that are remotely close to Trading 212 in terms of functionality, ease-of-use, fees (preferably free), instruments offered, etc., but which are also flexible?