Originally Posted by
plunet
And I can assure you that whilst airlines might consider other separate tickets in their assessment of whether you have the right to enter your immediate ticketed destination or your separately ticketed final destination, contracturallly they only have to consider the journey you have presented on the ticket that they are operating. Anything else is a customer service gesture or possibly a customer policy.
I can also say having travelled with a Chinese national that Qatar have considered onward travel ticketed with BA when their own ticket ended at LHR. But that is a published Qatar policy.
YMMV.
The UK rules are extremely clear. OP will have no problem. In fact anyone with a US or Canadian visa/permanent residency card can enter the UK (clear immigration) without a UK visa for up to 24 hours and are even permitted to travel out of a different airport in the same city (LHR arrival and LCY departure for example), if they are arriving into the UK directly from US or Canada or having a ticket from the UK to US or Canada. Many people, including often airline employees, don’t believe this but it is true and available. It’s published on home office website and also in TIMATIC for airlines to view.