Northvolt, Lilium, Graphcore: Europe's deeptech credentials take a battering as darlings flounder / Lilium was once a promising 'air taxi' startup worth billions. Now it's on the brink of insolvency / Air taxi maker Lilium is out of money and will cease operations / Flying taxi startup Lilium faces insolvency if not able to "immediately" raise more capital / Flying taxi firm Lilium receives EU approval for its electric jets