I think we've all been there!
There was the time on my first landaway solo when I was happily approaching on final for 07 at Sywell when 03 was the active...the FISO noticed before I did and advised me of my mistake
Those of you who've visited will know that they have the frequency blaring out of a tannoy at the restaurant, so a good 50 people would have had a good laugh
Survived it though, and will remember to glance at the DI next time I'm on final