The calculated distance (air line) between Stoke-on-Trent and Brentwood is approximately 142 miles respectively 229 kilometers.
By car or train, the actual journey to Brentwood is certainly longer, as only the direct route (as the crow flies) between Stoke-on-Trent and Brentwood has been calculated here.
Air line (approximately)
229 kilometers
123 nautical miles