So I have this awesome 14 3/4" x 10" Rainfall shower head as pictured (ebay picture not how it is installed currently, mine hangs over the shower)
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It is attached via an adjustable arm as pictured

I can not describe accurately how awesome these rainfall shower heads are, I converted everyone around me to get them and they are not disappointed. If you don't have one, get one! You can get them on ebay pretty cheap but just stay away from the LED ones as they are stupid loud and the LEDs don't last long. I got my shower head for a steal, $25 shipped and then it was $18 for the adjustable arm.
Anyways on the the issue.
The lady and I are going to London for 6 months and the flat we have waiting for us has one of those "shower head rails" as pictured below.

This will just not do, not after experiencing the wonder that is a rainfall shower
I was hoping there was someone that could help shed some light on fitting my shower head onto this type of unit without modifying anything (This is key!!). My google foo failed me in my attempts to find an adapter or something.......