Chief executive Paul Gratton said further revenue growth and a flattening cost base should see Egg's core British operation remain firmly in the black. 'We are sustainably profitable in the UK,' Gratton said. 'We have had a good start to the second quarter. The repositioning of the online savings offer, including new guarantee and bond products has had excellent uptake from consumers. Combined with continuing growth in card customers this has resulted in 50,000 new customers acquired in the first three weeks of the second quarter,' he said.