Pre-empting criticism from environmental campaigners who slammed oil firms in the build-up to Thursday's May Day protests, Shell said it was proud of its performance. A spokesman said: 'We don't think these figures are embarrassing. We are pleased with these results, it is a strong set of numbers and we think it benefits the UK to have a strong international company. It would be wrong to speculate on the future, but if you look at the underlying performance it is very strong. We also believe we have plans in place to make further improvements.'