As the title says, these are ideal for mobile phones, and for that other hot item on here the R4DS.
I just purchased a couple, and because they are small items they ship for £1.49 (Royal Mail).
1GB £4.22 each +p&p
2GB £9.41 each +p&p
Don't forget you can also get HotUk Deals Discount too..... Can't remember how, so if anyone knows post it up. Ta