Slí = way, road, path & Sceach = thornbush, hawthorn, briar
Slí na sceacha = hedgerow walk/ way
The hedge.org is a voluntary group doing their bit. Their website has more links to relevant sites than you could shake a stick at [!] and brimmed with useful information. It also seems the local heritage councils have spent a few quid here too on grants to the various societies; and rightly so, they are so important.
That said, whilst it is maybe indirectly taxpayers money, it is theoretically free and beautiful! Put on those funky trainers, get outside with those old woolie warmers on you and watch nature changing around you. I love it!