I used to live in Wellington, so know the area well.
The Wrekin is great for a quick blast, but is not that big. Lots of great tracks all round the back, so go exploring. Pretty difficult to get lost, but, it’s gets VERY busy with walkers, especially at the weekend, so best to do a dawn raid.
PLEASE, PLEASE, PLEASE do not ride in Ercall woods. The quarries are actually a designated SSSI, and are managed by the Shropshire Wildlife Trust. The Wrekin is for biking, and it is pretty much tolerated up there ( as long as we all behave ), but riding in Ercall Wood is just going to pee people off.
http://en.wikipedia.org/wiki/The_Ercall
Having said that, the bombholes at the bottom of the woods by the road are ace, and they are accepted as fair game, but please don’t ride up at the top, tempting as it is.
*climbs off soap box*
Thanks