@neil
In addition to morning having broken, I found my coffee grinder had partially seized. Then, while disassembling for emergency maintenance I literally ‘ground its gears’ necessitating a new grind adjusting shaft (with the grawnched gear on the end). Restored to operation, albeit with very limited adjustment until the replacement part arrives (£2.15 + p&p). Kudos to De Longhi for maintaining parts availability!