Ipswich's disappointing afternoon was completed in injurytime when Leadbitter lost control of the ball, over-stretched and clattered into Paul Anderson and was shown red as a result.
Elima then followed this up with a nifty sidestep, and sensing that they could at least make a game of it in the second half, the Dragons went all out for a third try, a commendable approach seeing as they had lost captain Greg Bird through injury at half-time.
The north Londoners, who lost Andrey Arshavin and William Gallas to injury before half-time, looked to be on their way out of Europe and potentially on the wrong end of a humiliating beating as Barcelona struck twice in the opening stages of the second half.