ELIZABETH HOWCROFT and MARCH JONES EXTENDING  a scheme by major economies to halt billions of dollars in debt service from poor nations during the coronavirus crisis would be very helpful, Angola's finance minister has said, promising a lean approach from her country. The G20 group's Debt Service Suspension Initiative (DSSI) has since April helped more than 40 developing world nations defer at least $5 billion in official debt payments. An extension is expected in coming days, though it might only be until the middle of 2021 rather than the end as debtor nations had hoped. "We are very keen... to…