It usually involves a collection of:
The nice little bit of singletrack by the side of Brickendon Lane
Down the windy footpath from Monks Green farm to Ermine Street (in Broxbourne Woods)
Part of Cole Green Way, blast down past the SQ quarry cross the B158, lovely b'way to Stockings Lane Farm
Across the landfill at Panshanger, through Tewin on the road and into Harmer Green Woods, along Robbery Bottom Lane (how lovely is that?) to Datchworth
Back down through Bramfield Woods
I live in Hertfordshire. I bought some maps and explored, there's loads of good riding. Nothing white-knuckle technical but good riding just the same.