Lots of 7 batteries fail within 10y: not sure why. As a first approximation: Starts on external jump but not own battery: starter and engine OK, but battery or cables or connections not OK. Starts on push but not on external jump: engine OK but starter etc isn't. While you're waiting; 1 Start inspecting and wiggling the relevant leads and earths. 2 Do the headlamps come on at all when the engine isn't running? 3 Ignition warning light as above? If the alternator etc is working it might run fine with a duff battery once it's started. Jonathan PS: Great local wine for dinner.