 The line climbs steeply out of the Medway Valley at gradients of between 1 in 47 [ Note 3 ] and 1 in 300 to a summit south of Tunbridge Wells , the line undulates as far as Wadhurst at gradients between 1 in 80 and 1 in 155 before descending into the Rother Valley , which it follows as far as Robertsbridge at gradients between 1 in 48 and 1 in 485 . The line then climbs at gradients between 1 in 86 and 1 in 170 before a dip where it crosses the River Brede . This is followed by a climb to Battle with gradients between 1 in 100 and 1 in 227 before the line falls to Hastings at gradients of between 1 in 100 and 1 in 945 . 
