Yes, just add half teaspoon of vanilla and half teaspoon of brown sugar then gradually reduce the amounts.
And soy isn't recommend UK as it contains so many hormones it's thought to be linked to infertility in males later in life and something to do with female hormone production of estrogen or something (sorry I'm just trying to remember off the top of my head the research I done). Also, using soy as the main source of nutrition after a cow's milk allergy has been shown to increase the risk of a soya allergy, and like someone else said you don't want to end up allergic to soya as little bits of it are in everything!!!! More research needs to be done but best to errr on the side of caution. As other's have said, it's there to be used as a last resort as sometimes nothing else works!
Goats milk formula is available to buy online or in health food shops - look for nannycare, again it's not recommended in the UK but I couldn't really find any research on it, I think it's because cow's milk and goat's milk are so similar.
Good luck xx