Fixed Cash ISA maturing - transfer options

SavingsBoo

I have a Shawbrook cash ISA maturing early September (it was a transfer of a previous year's full allowance not current tax year) and their maturity options are not great so have been looking at alternatives.

I have opened the Virgin Money Exclusive 1 year fix (having opened a current account recently to get the regular saver) but Shawbrook was not on their list of banks that could be electronically transferred in and there was a form to fill in and post instead.  But I have found another online form on Virgin's website that does seem like it would accept Shawbrook as an option!

I am thinking for peace of mind and in case I do still have to resort to snail mail it might be easier to request Shawbrook to transfer into their Easy Access cash ISA on maturity and wait until then to fund the Virgin ISA - I have time if I understand correctly as I have until 30 days after the account becoming NLA to fund it? 

I was thinking to split the Shawbrook money between Virgin and another maybe easy access or limited withdrawal Cash ISA and this I think is also possible because it's a previous year not current year's allowance, is this correct?

I'm slightly dubious about Trading 212 for some reason having read lots of mixed feedback but after having gone through a somewhat tortuous process to open the Virgin account today maybe my thinking is shifting to 'it can't be any worse than Virgin'