I arrived in LHR this morning for the outbound leg to WAW. I went to the BA Ticket Desk in T1 Zone R and asked for the change to be "stickered." The agent tapped at the keyboard, pulled out his book of stickers and duely made the change. No questions asked.

I then went to the check-in desk and had my outbound BP issued (BA Miles booking). The lady checking me in was a little perplexed as to why I was coming straight back but issued the return BP with no problem. She was genuinely interested about my trip and I then spent about 5 minutes (there was no one behind me) explaining to her why I was doing what I was doing.