Energy crunch to stay as oil tipped to reach $100 a barrel

Global supply shortage and strong demand in the US pushing prices up

Experts anticipate prices to hit between $90 and $100 a barrel.

Oil prices have edged up to fresh multi-year highs, supported by a global supply shortage and strong demand in the US, the world's biggest consumer.

Brent crude rose 42c, or 0.5%, to $86.41 (€74.56) a barrel, while US West Texas Intermediate (WTI) crude rose 95c, or 1.1%, to $84.71.