Originally Posted by NWIFlyer

That also works, but it will take a lot longer - not least because buses from Bath Road to Central Bus Station are very frequent, whereas there's less bus options to T5, then Underground trains onwards from there are only every 10 minutes (and Liz line even less frequent). T5, considering the single biggest operator at LHR is primarily based there, really is not at all well-served with public transport compared to T2/T3. There were probably reasons, but it always strikes me as a frustrating oversight that public transport is so poor to and from there given the emphasis that should have been put on it with a new-build terminal. The cynic might say that HAL gets to collect more drop-off fees as a result ...