The University of East Anglia is British, and not subject to US laws, including FOIA. If the e-mails include US addressees, and if the US government chose to prosecute under RICO (fat chance), then US e-mail records of those funded by US taxes could be subject to FOIA.
No, but the British also have a freedom of information act, abbreviated as FOI.
I do believe the British laws do cover FOIA, but under another name. This could clearly go somewhere. Once their truthfulness is questioned, they become a stationary target versus moving target. I think the huckster know it and will try like hell to achieve their aims at Copenhagen (much like Obamacare). They now will have to respond to questions that the layman can understand: did you knowingly corrupt data to fit your ends. Once this is the repetitive question from the press they are dead.