Hi Tonka. I always used to use Lucozade gels on my long runs too. I tried Hi5's (as they were being given out on a Half that I did) and ZipVit gels, but both gave me a bad tummy towards the end of races 
When my local Boot's stopped stocking Lucozade gels a couple of months ago they replaced them with Nectar gels (which are made by the For Goodness Shakes people) and were great, more fluidy than most so go down without water, taste great and the only slight downside is they are something like 35g of carbs where as some I'd tried were 45-60g? Maybe that's why they didn't mess my tummy up?!? Boot's also did the SIS ones which were 60g of carbs ish, and can come with caffine, but I thought they tastes awful and again, killed my guts!
Good thing about Boots is they quite often have them on 3for2 
Hope that helps?