There is no restriction on the Sat broadcasting from Astra 2D, other than the signal has been reduced significantly to prevent reception outside Britain, in reality all that has achieved is a growth in the Big Dish market as depending on your area you get the dish required to meet the need,
For example in Northern Murca ( Abanilla/Yecla/Jumilla) you will need a minimum 2.4m to get some channels and that wont be 100%, whereas further south IE Almeria they only need a 1.4M in some areas, and get everythingbangin in!!
It all depends on where you are and of course as always size is everything!!