Looking to book a trip for my 80 year old mother to my sister's in Australia. She's done it economy before but doesn't think she can cope with 24 hours with no sleep any longer. Business class is far too expensive but my sister is picking up the tab to upgrade her if we can find a premium economy that is actually worth the extra money. She needs a seat that will lay down as far as possible. Anyone had any experience of a decent halfway house cost flight to Aus where they could actually sleep?