Brighton to Hove & West Worthing (Class 313) London Victoria to Brighton (Class 377) London Victoria to Eastbourne (Class 377) Brighton to Portsmouth Harbour(Class 377) Brighton to Southampton Central(Class 377) Milton Keynes Central to Clapham Junction (Class 377) London Victoria to Little Hampton (Class 377) Little Hampton to Portsmouth & Southsea (Class 313) Eastbourne to Ashford International (Class 171)
To me, that looks like 4 routes... Brighton to London Victoria (50 miles total) - With the option of the 10 mile branch from Keymer Junction to Lewes Brighton to Portsmouth, Southampton Littlehampton and Bognor Regis (51 miles total) Eastbourne to Ashford International (41 miles total) Clapham Junction to Milton Keynes Central (51 miles total)