@Henco *********
. In your case yes,because you proved you have access. Some fixed term accounts (by your choice) don't allow early access. Thats what immigration are looking for. All they want to know is you have easy access to funds to live here on long term. Proving instant access to an account with 800k in it is proof, regardless of its type. Take it up with the imm officer, not me, mate .
There was a spate of people using other peoples money to do this (via dodgy agents for a fee) that weren't allowed to withdraw any amount during the process. Imm caught on to it and have clamped down. Again, instant access proves this isn't happening.