I have a flight on TG SGN-BKK which connects about 90 minutes later to a BA flight BKK-LHR (and onwards to GVA). The flights are on separate PNRs. Will TG interline my bag through to LHR (GVA)? If not, I'm not sure the connection time is comfortably enough to collect bag and recheck it. I have another option, which is to book TG (almost) all the way, but it's less convenient logistically (involves train from ZHR).