In country application - Third Party Funds -90 day rule

[Aikoren]

I am applying to switch from a Tier 2 ICT to a Tier 1 using the 200K route. I am applying within the UK prior to the expiry of my leave.

The Policy states that when you apply within the UK, the funds must be held in the UK. Is this also the case that third party funds must also be held in the UK? There is an exception to the 90 rule on holding funds in a bank account if the source of the funds was a Third Party. Is it sufficient to provide a third party letter attesting to the availability of the funds to the business on the date of application and beyond or do the funds also need to be transferred into my account as of the application date and is this subsequently checked?

In addition, if I have had the 200K in a personal account outside of the UK for a consecutive 90 days but transfer it into the UK prior to application and show those funds in my account, is that sufficient to satisfy both the documentary requirement to show bank statements having access to 200K of personal funds and having those funds in my account in the UK, although they were not in the UK account for that 90 day period but are held in the UK at the time of application?