bicycle boxes at Heathrow
 

I will be finishing a self supported tour in central London and I need to find the preferred way to get me, my loaded bike and a bike box to Heathrow airport. I would prefer to ride to the airport and have a box delivered to the terminal, but so far I have not found a way to do so. Please help ! I am also looking for a source for paper bike touring maps of southern England, Belgium, and northern France.
Velobob