The West Coastway route is a great route! Class 377 and 313 run down it a lot. I thik this will be a nice addition to TSW2. I'd be happy with a standalone DLC or an Add-on to the East Coast Way. Services from Bognor Regis to Littlehampton can easily happen. At Barnham, you can take over Southern services to Brighton from Portsmouth Harbour or Southampton Central. Littlehampton to London Victoria services can be taken as far as Hove.