The Devon Riviera Line is a suggestion based off of GWR’s infamous route right next to the sea, Ranging from Paignton - Exeter St David’s calling at Torquay, Torre, Newton Abbot, Teignmouth, Dawlish, Dawlish Warren, Starcross, Marsh Barton, Exeter St Thomas, and Exeter St Davids using the Class 150. 158, and 165 Turbostar
I like the idea. Friendly tip: if you want to sell this idea, a little more detail such as route length, a timetable etc. may be helpful.