All very odd.
The Banksy in Folkestone was painted on the wall of an amusement arcade whose tenant was Dreamland Leisure Ltd which went into voluntary liquidation 23/11/15 (director J M Godden), after a long court battle over 'ownership' of the work which they lost to The Creative Foundation (director Sir Roger DeHaan)
Dover's Banksy is also painted on the side of a (former) amusement arcade which whilst boarded up still proudly displays the logo of Castle Amusements Dover a trading name of Dreamland Leisure Ltd which takes us back to the Godden connection.
Why would Banksy enhance the value of this property in particular and is there a white knight with deep pockets to pay our learned friends to ensure the mural remains in Dover? Just wondering.
Let's hope it is not flammable!