I see you're from Aberdeen, so you should pop over to Aboyne and watch the gliders land on what I'm told is little better than a big footpath. You'll see them constantly adjusting the circuit and sometimes improvising radically in what can be extreme conditions.
When I learnt to fly gliders I had a real problem with circuits because I was trying to fly an identical circuit each time. In a glider every landing is a FL (no P), and every circuit needs to be different (having said that, it must be easier in a glider because you have enough performance to give yourself time; my sink rate in the circuit is around 1.5 feet per minute!).
Talk to the guys at Aboyne - you might even be offered a flight to see what unpowered circuit planning is like.