I have a flight coming up in October. DL 5075, PWM- JFK, connecting with DL 5996 (VS) JFK-LHR. Currently a 50 minute connection time. 5075 most of the time lands at Term 2 and 5996 leaves from Term 4. I have called Delta twice - the first rep told me to wait a few months and the schedule might change, the second time I was told there was nothing they could do as VS had sold it that way and it's married. I am a little concerned if I have to change terminals given the short connection. There is a PWM - JFK flight late afternoon the day before but they wouldn't allow that change. The tckt is Delta issued . I would greatly appreciate any thoughts or suggestions - Thank-you