The Country Code

Be safe - plan ahead and follow any signs
Even when going out locally, it’s best to get the latest information about where and when you can go; for example, your rights to go onto some areas of open land may be restricted while work is carried out, for safety reasons or during breeding seasons. Follow advice and local signs, and be prepared for the unexpected.
Protect plants and animals, and take your litter home
We have a responsibility to protect our countryside now and for
future generations, so make sure you don’t harm animals, birds,
plants, or trees.
Keep dogs under close control
The countryside is a great place to exercise dogs, but it’s every owner’s
duty to make sure their dog is not a danger or nuisance to farm animals,
wildlife or other people.
Leave gates and property as you find them
Please respect the working life of the countryside, as our actions can
affect people’s livelihoods, our heritage, and the safety and welfare
of animals and ourselves.
Consider other people
Showing consideration and respect for other people makes the
countryside a pleasant environment for everyone – at home, at work
and at leisure.

You may also view the full version of the Countryside Code online