Martin, smashing pictures. I have done a couple of walks around Bigland Tarn . I got the train from Lakeside to Haverthwaite station walking and then walked back via Newby Bridge. It is different from the usual walking areas and very enjoyable.
I have often thought about getting a bladder for inside my backpack but what puts me off is not being able to see readily what liquid i have got left. I carry bottles in the external side pockets which can be seen easily. There is a downside to bottles in that i have to stop and take my pack off to get st the bottles or ask someone to get one out for me and then replace it.