Manga UK Offering AKIRA 4K Replacement Scheme in February

Has anyone tried emailing them yet? I tried and got a delivery failure notification as if the email address didnt actually exist.
I've just bought this, how would I know if I've got the correct disc or not?
WMD is right the 2 discs are identical.

I would add, play the disc and if you see a message on the screen saying that your copy is a SDR version, then quoting WMD, you have a 'duff one' - you should ask Funimation for a replacement disc.