Jet 2 A321 Brum to Fuerteventura last year.
Both departing BHX and on final to destination there was visible vapour streaming from alongside the engine nacelle.
Not an aviation professional but been around aircraft long enough to have seen plenty of landings with condensation or rainwater trailing to be reasonably sure it was normal but mentioned it to CC who said something to the effect of they all do it.
Asked question here about it and confirmed it's a vortex effect around a vortex generator on the nacelle associated with high humidity.