Hi Julia, Gatorade is a sports drink its scientifically formulated with fluid,
electrolytes and carbs to rehydrate the body ways that water cant.
I do not know what it is equivelent to in the UK but there is a web site
to go to that you can probably find out they also have a toll free number
to call to find out. here is the site. I hope this helps
if all else I am sure you can order it.
DStar