Originally Posted by
itsfred
I had the same experience connecting from AA to BA at T5 Heathrow. Overnight connections require pickup and recheck.
Not necessarily the case all the time... it depends on your ticket and alliance rules.
I had a SQ-SK overnight connection at LHR which my bags were checked straight through and 'kept' till SK flight the next day. I was on one ticket. Yet on seperate tickets, this was not permitted with similar routing before.