By Alex Lawler LONDON (Reuters) - World oil supply will rise more rapidly this year and a surplus could expand in 2026 as OPEC+ members increase output and supply from outside the group grows, the International Energy Agency said on Thursday, in contrast to OPEC's own updated outlook. Supply will rise by 2.7 million barrels per day (bpd) in 2025, up from 2.5 million bpd previously forecast, the IEA, which advises industrialised countries, said in a monthly report, and by a further 2.1 million bpd next ye ...