The voicemail Charlie leaves Lola in Milan goes "Lola, when you pick this up it's Charlie from Northampton" But when she plays it for Charlie, and Lauren after the cat-walk it goes "Lola, it's Charlie from Northampton."
Charlie's tie changes position during the sequence where he lays off the workers. There is one cut in the sequence where his tie is neater.
When the train goes through the station labeled Northampton at the beginning of the film, it's not the real Northampton station. However, as per IMDB guidance for "Errors in geography" Goofs, "... things like the use of the wrong railway station for the stated destination ... that don't alter the "reality" of the movie, are excluded."