I entered the car park very early, then had to drive around for over 10 minutes trying to locate a parking place, I ended up section P, area P5 right at the far end against the perimeter fence, the ground was wet and as the surface was gravel/dirt my foot ware was filthy by the time I reached the terminal. The buses at the car park were very efficient arriving promptly and taking me to T1. On my return I waited for 15 minutes for the bus which arrived at the T1 stop, the bus was massively overcrowded, and the weather was heavy rain, I had a large heavy case with me on arrival at my parking area I exited the bus into a large puddle and began to make my way up P5 to my vehicle,half way down I noticed a large puddle of dirty water blocking my route! I had to then go back to the road go to P3 make my way to the bottom then cut across to P5, so by the time I got to the car I was soaked and filthy! I know the weather is not your fault but the car parking surfaces and drainage is and I have to say it was extremely poor! I will add though that I had piece of mind that my car remained secure during my trip.