James Derrick
Hi zabdiel,
I've cycled past the S Newsham Road exit, so have connected it to the former reservoir.
https://www.mapillary.com/app/?pKey=2970819499900184
 The route is very clear on Bing high-res, and Strava activity heat map data shows this is a regular running track with a lot of activity heading towards the beach.
Happy Mapping,

James