Departing Heathrow - which terminal?

[Meredusoleil]

Booked to go to Barcelona tomorrow, all being well 🤞

Have been told since booking back in January that the BA flight would be departing from T5.

Then yesterday, I get an email saying it will be departing T3.

Then when I checked in online today, the boarding passes say T5!

I have tried several times to ring BA, but they won't answer the phone. I have also emailed them. The flight status checker shows the flight departing from T5.

What would you do? Go to T5 or T3?

I’d go by Heathrow website departures, that should be accurate

I just keep thinking what if the email is correct and everything else hasn't been updated yet?