The calculated distance (air line) between Ferndown and Stoke-on-Trent is approximately 152 miles respectively 245 kilometers.
By car or train, the actual journey to Stoke-on-Trent is certainly longer, as only the direct route (as the crow flies) between Ferndown and Stoke-on-Trent has been calculated here.
Air line (approximately)
245 kilometers
132 nautical miles