Julia Bradbury takes to the skies over Wales on a mission to help restore the peat bogs that criss-cross the Brecon Beacons, while Matt Baker heads deep underground to explore one of the UK's most important caving systems. John Craven returns to Cumbria - four months after the big floods - to see how farmers are coping with the clear-up operation. And, spring may be in the air, but Katie Knapman's been to a part of the Lake District which is still in the grips of the big freeze - ideal conditions for ice-climbing. Down on Adam Henson's farm, there are plenty of new arrivals but his plans to boost farm income with a fun ride aren't going so smoothly - and it's all because of our unpredictable weather!