Pushback and startup northside at Heathrow.
Anyone has an idea or ever got this clearance from the ATC at Heathrow?
I was in Heathrow few days ago and parked at stand 246. When we asked for the clearace to push, the ATC gave us the clearance to push and start approved northside.
We told the ground engineer just as the ATC told us but it seemed like he didn't understand what it meant. Once we started to face to the north we asked the ATC again just to confirm but he said he expected us to tail to the north and it was ok if we continued to tail to the south by now.
Just want to know that anyone here ever heard of this phaseology before? Has it been written somewhere? And why they used this phraseology as it may make confusion?
FYI we departed via runway 27L.