Originally Posted by
Often1
This was not a connection (see thread title). That likely bounces OP from collecting against anything against most travel interruption policies.
Another reason not to book separate tickets through LHR is that on a connection, there is no APD.
Doesn't need to be one ticket for APD. You can get refund if you fly in within 24 hours of scheduled departure from LHR. Having on one ticket means less hassles, as no refund needed.