Hi
For protein shakes it worth giving the diet one they sell in TESCO a go, it's a bit pricey, but they all are, I think they only do it in strawberry but it is quite nice.
Also one thing to point out from one of the posts above is that Horlicks and Ovalteen is very high in sugar, Horlicks contains 16 grams of suger and Ovelteen is even worse at 24 grams, so if you are one of those that dump or had type 2 diabetes and are now diet controlled and of your meds, these drinks can make you quite ill, when I tried Horlicks it gave me a blinding headache that crept me up all night, so watch out.
Paul