I've bought "Boots" VG in the past. It's fine to vape with.
Better to buy bulk though. Here's a few examples :
Vegetable Glycerine Ep/usp Food/cosmetic Grade 1litre | eBay
2 LITRE VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
20 LITRES (4 x 5 LITRES) VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
10 LITRES (2 x 5 LITRES) VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
5 LITRE VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
Better to buy bulk though. Here's a few examples :
Vegetable Glycerine Ep/usp Food/cosmetic Grade 1litre | eBay
2 LITRE VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
20 LITRES (4 x 5 LITRES) VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
10 LITRES (2 x 5 LITRES) VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay
5 LITRE VEGETABLE GLYCERINE EP/USP FOOD/COSMETIC GRADE | eBay