The ad says "it went into storage at Rudlers where it has been kept safe professionally". He doesn't say which service he used but Rudler's offer one which includes "service in our dehumidified building gives a monthly check of your vehicle. We check all fluid levels and tyre pressures and then roll the car and run its engine to warm. Importantly the battery is connected to an Airflow battery manager at all times, keeping it in top condition". So probably unlikely to be unmoved...in fact probably better than if kept in someone's garage and only driven occasionally (
http://www.rudler.co.uk/carstorage.html)