I get into T5 at 7pm from a Domestic UK flight and leave from T4 at 9am the next morning on Gulf Air. Going to stay the night at a airport hotel so want to avoid taking my luggage along with me. Normally BA tags my luggage through to my destination when I am on the same day connection on GF.

Not sure what happens when there is a overnight connection. Can anyone clarify? I would ideally like to check the bags in from my domestic flight.