Not quite - with EBCI you are automatically checked in at 36 hours, you don't actually do it. You can then go online as early as T24 to see what position you got and print your boarding pass.
Otherwise its T24 to check in and print the boarding pass.
thanks for the replies. It automatically checked us in at 36 hrs and then I logged on today to print my boarding passes at the 24 mark. DD and I got A44 and A45. I was hoping for lower numbers but meh! whatever. I'm going to disney world!