Posted: 03/10/2014 at 20:31
As it should already be well-rotted down, I would stack the dung with a plastic sheet over it for the winter - this will stop the rain washing nutrients out.
I would then rough dig the allotment and leave it for the wind, rain and frost to break up, then in February or as soon afterwards that you can get on the land without it sticking to your boots I'd spread the manure and turn the soil over. If the weather is kind it will then soon be ready to rake down into a fine tilth for seed sowing and planting.
I'm assuming that all the pooh is from herbivores - you don't want any tiger pooh on your allotment.