Oil prices extended gains for a second session on Wednesday after a strong jump in manufacturing in China, the world’s top crude importer, boosted the outlook for global fuel demand. Brent crude futures for May rose 46 cents, 0.6 per cent, to $83.91 a barrel at 0445 GMT. US West Texas Intermediate (WTI) crude for April gained 42 cents, or 0.6pc, to $77.47 a barrel. Oil prices continue to be