The Castle courses are expensive, but from what i am told, reasonably good. If you do have mates who can let you tag along, my view is that you will enjoy learning a lot more from them and you can spend the money saved in the pub. Also, if you're planning on climbing routes (on ropes) you'll need at least one friend anyhow.
Thanks for the info. It's an aim of mine to have ago over the winter some time so I'll look into both routes.
Thanks for the info. It's an aim of mine to have ago over the winter some time so I'll look into both routes.