Use at your peril, If I could zero rate this company I would. We thought we would try a different supplier as the price quoted by Certas Energy was £0.12 a litre cheaper than our usual supplier, what a HUGE mistake. We ordered and paid for 1000 litres of Premium heating oil on the 13th of February and received an email advising the oil would arrive by the 27th February, no further communication was received so this morning (27th) I called their office to ask if it was coming and approximately what time, I was told yes it was coming and any time after 10.00am. The tanker arrived just after 10.30am, very pleasant driver who managed to pump 200 litres into our tank before his system failed, despite his best attempts at getting the system sorted he could not and handed me numerous print outs and a phone number to call to arrange a convenient date for the balance of my order to be delivered and off he drove. Well, I called the number and spoke to a gentleman who couldn’t have been less interested in what had happen but went on to explain that what had happened was in fact “not” a failed delivery because allegedly 200 litres had been delivered successfully. He also informed me that they would not be returning and that I would be refunded the balance of the undelivered oil. This company deserves to fail, by the time we receive our refund our money would have sat in their account for 22 days. Absolutely appalling service.