Originally Posted by AlbaGuBrath

I'm thinking about reducing my contingency on an ex-EU trip from an overnight to a back to back.

GLA-LHR-OSL - One PNR
OSL-LHR-SYD - Connecting 'back to back' on the OSL leg on a separate PNR.

Let's assume I am comfortable with the separate PNR risk - from what I understand BA are often very accommodating.

If I had a long enough transfer time at LHR on the GLA-OSL PNR, could I check my luggage in for my OSL-SYD flight?

Would it even be possible to check my bag in GLA-LHR-OSL-LHR-SYD? I assume as it is back to back this would not be possible.

I'm sure I've read an answer to this question before, so sorry my search skills are lacking!

Thanks!