Zenrat, Chris - thanks a lot. Minor blip to be honest, to be expected when in the early stages of heart failure (general catch-all term for 'there's something not quite right with the heart'), unlike father-in-law who's in later stages. She's 90 (and otherwise in very good health for a person of her age), while he's 89 and in poor health. Ho hum, comes to us all. Anyway, it was a brief diversion and Mum's getting back to normal (albeit with the heart failure), she was in hospital for two nights.