Could someone advise please.
1) Miggy has been stood for a week
2) Went out today to start her
3) Turned ignition key, rev counter and speedo needles started jumping all over the place, car would not start, not even a click.
4) Started Miggy using jump leads from daughters car.
5) Miggy started, let them both tick over for a while then disconnected jump leads.
6) Took miggy for a 10 mile ride with Mrs Miggy, got back on drive, turned her off then back on again no problem.
7) Left her for 20 mins then went back, she would not start, battery flat as a pancake.

jump leaded her again, she started.
9) Turned her off, will not start after 20 mins again.
Whilst she was ticking over I put a meter onto the battery, turned the lights on, the meter dipped for split seconds then back up to normal, I take it this tells me the alternator is ok.
Could it be that the battery is not holding a charge.
Pete