Knowing where the best roding sites are is a case of going out at the right time, they're certainly not uncommon in your area Pranticol, but they can be difficult to find if you're not familiar with the habitat they favour. In South Cumbria try Roudsea, Holker Moss, Meathop Moss, Fowlshaw Moss, the woodlands around Rusland Valley or even the woods around Leighton Moss (Warton Crag, Grisedale, Gait Barrows, etc) if you want to venture into Lancashire. I've had roding Woodcock from the layby overlooking the reserve! In winter just find a likely-looking woodland edge that has a clear view of the sky and look west towards the setting sun, you should see Woodcock flying out to their feeding grounds. Most people fail to find Woodcock because they leave too early, Woodcock are usually the last birds to move in winter - Snipe and ducks will generally flight before them. When you think it's too late, wait another ten minutes!
Cheers
Jonathan