The explanation for the 12,000 increase in 14 hours lies with a boy aged about 8 or so years old. He had discovered a non bicycling way to trigger the counter. I saw him at 7:20 last night carrying out his entertainment and warned him off.
The installers will be back tomorrow morning with a view to resetting the counter. The counter is still being bedded in and tested.
The average, prior to our young friend's activity was a little below 2,000 per day.