The calculated distance (air line) between Stoke-on-Trent and Becontree is approximately 140 miles respectively 225 kilometers.
By car or train, the actual journey to Becontree is certainly longer, as only the direct route (as the crow flies) between Stoke-on-Trent and Becontree has been calculated here.
Air line (approximately)
225 kilometers
122 nautical miles