In reply to stupot1988:
1. Get hold of a separate abseil rope. 50m of static gives you spare length for equalising stakes.
2. When abseiling in, make sure you have the climbing ropes with you!
3. Know how to prussik, in case you end up in the wrong area or unable to climb out.
4. Start the grades low and get a feel for it. Pembroke can be quite intimidating and pumpy.