Abe said:
mate you're talking out of your posterior, H&B don't sell cheap quality protein, they sell expensive garbage. I can't even be bothered to go and look at their site but I can pretty much guarantee that to buy 5kg of protein from there would cost around £50+ and it will be full of sweeteners, fillers and just low % protein content.
Breamy goto
myprotein and they will beat ANY uk price by 5% guaranteed. At the bottom of their homepage is a pricematcher. Copy & paste the URL of the cheapest protein you can find on the net. They will match it, then type the code MP5500 in and you will get a further 5% off, it's that simple and that cheap
I think the cheapest I've managed so far was £20 for 5kg inc delivery!!
Oh and it's also the highest quality protein you'll find, it's 80% pure protein, mixes in water with a fork if needed but I'd highly recommend getting a shaker, they're a godsend
If you want something to drink while you train then get some L-leucine and mix 10g with 10g whey, mix them in water and sip that while you workout, it's very anabolic as it will stop your body burning any muscle for energy while you workout. Also incredible for recovery, cheap too!
Be aware the leucine is like fairy dust and tastes awfull, you WILL need a shaker cup to get it to mix. Worth it though
EDIT - Sorry PAz didn't read your post properly, could have saved myself 10 minutes there typing this out

you didn't mention the 5% off though...