Having just had a very lengthy and complicated conversation with an operative at the wonderful DVLA, this is our understanding of the situation regarding cars in stock with valid RFL come October 1st. If the DVLA have been notified that 'the vehicle is in trade' prior to 1st October , then the RFL stays with the car until expiry, even when re registered to the next owner. If the car has not been registered as in trade come 1st October, then the RFL on the car is refunded back to the previous keeper when it is re registered after this date, as this will inform the dvla of the disposal of the vehicle by the previous keeper. It is the notification of disposal of a car which triggers the RFL refund. If anyone has any ideas on how we can continue to drive taxed trade cars going forward after the 1st October without self registering/taxing used cars, we would love to know ??!! Cheers Karl Ridley @AutocarsHull