Originally Posted by
Richmond_Surrey
Yes, you can check in your bag at any point but you will have to leave ariside and get in again.
Strictly speaking, no you don't. There are 'bag drop' counters airside at T5 - for all the duty-free purchases!
Originally Posted by
Riddles1966
Thanks for responding Richmond. When you mention have to keep the baggage airside how does one get this added to the hold. I've only dropped off bags landside and had assumed i needed to exit and then re-enter. Is there somewhere to store bags airside and somewhere to check them into hold. thanks
Nowhere to store airside (other than the lounges, but do not do this as it poses a security risk, particularly if there is an IRROP and you don't make it back to LHR.
To answer your question - you can add a bag at any point in your journey. Typically, landside, at the check in counters. What
Richmond_Surrey is meaning to say is that you will have to come landside through the UK Border to check your 'extra' bag in (the assumption here being that your additional bag will be landside, rather than airside).