May I recommend this lovely one from Amazon.
I stumbled across it the other day while ordering some posh makeup brushes for DD2 and some perfume for me; it wasn't difficult to bump up my total to £40, and then the box is free. It has some lovely stuff in it; I reckon it's tons better than the Summer Box M&S did recently.
I've already tried the Mio calming spray, the Time Bomb neck cream and the nail varnish. The Miller Harris perfumes are gorgeous, and decent size samples.
One watch-out - the £40 spend has to be Beauty Care items supplied by Amazon (i.e. not Marketplace), but I didn't have any trouble finding things.