I Have been with Certas for a number of years and before with Emo. I looked online over the weekend and they were quoting 45p per litre which I thought was expensive. I called them on Monday morning and was actually quoted 33p. I advised that I had been quoted 26p per litre and they answer I got was I could ask if we could give you a discount but couldn't promise....... why is the price shown/given not the best price? I have been with this company fro around 15 years and unfortunalty can't see me using them again, and I am so disappointed that I placed a order with them earlier in the year where I now see I paid well over the top.