I decorated my hall with satinwood and within 18 months it is now cream not even off white but cream.
As I said upthread I then used Leyland which is Johnstones trade paint (the same stuff my decorators used) and painted the skirting and architrave in the hall because we are replacing the doors and it just goes to show how yellow the satinwood has become.
As struggling said they changed the law on the level of solvent that could be used in paint so it yellows far quicker than it ever has.
There is a video on YouTube that shows you the dulux paint, I can't vouch for it though as I use Trade places not DIY sheds.
The massive difference with the water based gloss/satinwood/eggshell paint is when you paint it, it doesn't give the coverage that you expect (if you have previously used gloss or eggshell) so you need to apply 3 thin coats rather than plaster it on. But the best bit is by the time you have given it one coat it is ready for another. It dries very quickly. Plus it isn't as glossy/sheeny.
I used this primer and then this gloss I am an eggshell person normally.
I started somewhere discreet so that I could test it out. It definitely needs watering down so decant it into a paint kettle, add some water, mix well and put it on. In the end I could do it by eye. I painted 2 brand new doors, primed them first despite them having a factory prime already applied, brand new skirting in the new kitchen extension, plus skirting in the hall and the architrave for 5 doors off the hall.