Update. There are still tickets available here.
(Thanks Ben for the tip. I now have my tickets.)

The pre-sale for the Brixton Academy (O2 Academy at Brixton) gig on 10 June was already sold out by 1030 CET this morning. A number of fans were able to access the Ticketweb link via the Download Festival forum or after having received an email. Here’s hoping there are still plenty of tickets left for the general sale on Friday at 9/10 UK/CET time.

I narrowly failed to get a ticket this morning. After successfully getting the final ticket on sale I forgot to put in my CVC number and the same was gone. Doh! Roll on Friday.