Freda started OK this morning, drove three miles to train station and parked up.
This evening, Freda started OK - drove 200 yards and radio cut out and speedo and rev counter stopped working (speedo is chipped)
Still running OK, set off towards home. After about a mile noticed Hold light flashing steadily (approx 1 second on, one second off)
Pulled up outside favourite chippy and bought my tea

Freda now behaves as though battery is totally flat and will not restart

Phoned RAC - took them 20 minutes to answer and it'll be up to 2 1/2 hours before they arrive.
Any ideas???
Cheers,
Dave (cold!)