"Was a teen when Mt St Helens erupted so know the chaos that can be created with ash, airports closed, livestock challenges and breathing acid rain air for the elderly. St Helens ash with clipper winds reached Quebec and parts of NE USA during 1980!"

Eoin Treacy's view Thank you for this insightful email. Please also see David's link to the BBC article above which suggests that the eruption may be losing strength. British Airways found support today near 220p and bounced quite successfully. A sustained move below that area would be required to question scope for further higher to lateral ranging.