[QUOTE=I was just wondering whether CX would be able to check our bags all the way to LHR with us? A secondary issue is whether they'd be able to give us boarding passes all the way to LHR, or whether we'd have to approach the BA check-in at DXB.[/QUOTE]
Checking through should be possible. I have done a six-sector leg before. The BP issue though - the later flights may not have "opened" yet so they may not be able to issue a BP. However, you may be able to get mobile boarding passes as you go along if you have data roaming or wifi access - I have done that before too
Only if there is an interlink agreement. I have a flight coming up booked on one ticket, but transferring from CX to TG and I have been advised that I will have to pick up baggage at my transfer point.
They can check bags through from CX to TG domestic, but the last time I did this (HKG-BKK-Hkt) we had to clear immigration at the transit point in BKK, but still collect bags from the international section at HKT and then clear customs. Very confusing!