The company had lost three quarters of its market value since January and had scrapped its dividend to shareholders.
Short-term credit lines of £100m have been agreed to help it survive December, traditionally a poor month for the industry.
It also agreed a renegotiation of an existing £150m loan and a £850m credit facility.
A ban on dividends was part of the new deal, and some analysts warn that it may yet have to ask shareholders for more cash.
But others were more hopeful.
"It's a positive development which addresses a widely-held investor concern," according to Charles Stanley analyst Douglas McNeill.
The company unexpectedly announced the departure of its chief executive in August, and has yet to announce a successor.
The company has been looking outside the industry for Manny Fontenla-Novoa’s replacement, and analysts expect a selection to boost share prices further.