Positioning greenhouse

I'm looking for any advice on positioning our 6x4 greenhouse in our garden.  I've tried to sketch the basic layout of the garden, and shown the 2 positions we are considering, p1 or p2.  P1 is preferable as far as my other half is concerned, but I wondered if there any factors we should consider before deciding.  The sketch is not terribly accurate but shows rough positions of various things in our garden that are fixed like the shed a tree or two, and trees in the neighbours gardens that affect the sunlight too.

The garden is about 40m long and 8m wide, southish facing (sketch shows rough path of the un too).

most people would put the long side to face the south - ie to catch most sun as you can shade or vent against too much sun but cannot do anything if too little sun reaches gh. Obviously you need to be out of shadow as well. Assuming you will grow in most of your greenhouse "ground" you would have to put your gh to far left of your picture with long axis pointing top to bottom. That does not look to be practicable if you are looking at p1 or p2.. If you are using benches and propagators or grow lights then not so important. If it was me and if your sketch is accurate then P2 gets the earliest sunlight as it can face east without shadow so be sure you can keep heat in by closing doors early However it soons gets shadow from shed so less time in sun. If you go for p1 then it only gets sun later as sun in shadow in east and clear in south and west so need if possible to orient greenhouse to face sun as much as possible by turning a bit across corner and keep glass very clean and unobstructed so warms up immediately sun reaches it.Life is never easy.
Getting power to it and catching water off it as well as cleaning all round and safety if near paths or play areas are also factors . Keep door to sheltered side if you have strong winds and think about any louvres or windows.
R

Thanks for your tips everyone.  Definitely some things there I hadn't thought about such as wind and direction of the door etc.  will have to look into those.  P1 does make it less of an eyesore in the garden which is why my wife prefers it there.  I think that or she will ultimately win that option, but will consider the door position etc.