Popped along to take a look at this today, and also its continuation in St Albans, Beech Bottom Dyke.
It’s an impressive defensive ditch, but I’d be inclined to just walk along to the end and attack at that point!
Of course, it’s very overgrown now, with bluebells in abundance, as well as the usual detritus of 21st century living: broken cycles, botles, syringes etc. Apart from that, it’d be a nice short woodland walk alongside the housing estate.