In reply to Indy:
> (In reply to blablablacksheep)
> Broxbourne, isn't that the Waltham Cross sort of area?
Yes, north of WX.
To the OP.
I lived in Cheshunt & Ware until a couple of years ago. Your quickest wall by far is Harlow wall and it's pretty cheap and friendly. Good little wall.
The Castle can be done in about 45 minutes on a good run, on a bad run - could take any length of time. It was horrendously expensive 2 years back, don't suppose it's much cheaper now. Great wall though and easy to meet people.
London Mountaineering Club used to meet at the Castle once a week. I was in them for a little while, friendly club, mostly lower grade climbers.
NLMC climb at Mile End I think. They tend to be mostly more experienced climbers I think.
I seem to remember there is a Hertfordshire MC too, who from memory used to meet in Loughton for a while (maybe they should change their name?) although I could be wrong about that.
HTH.