Yes, it is allowed. Just make sure that you do it safely, with a proper backstop and aways from others, and ensure that you have your PAL and registrations with you, depending on where you are you may find yourself having a conversation with the police/gameys. As long as you have proof that you are target shooting and not hunting out of season (IE you have targets and the associated paraphernalia , or a skeet thrower and clays) you SHOULDN'T have a hassle. However you also need to clean up after yourself, don't leave brass or targets etc laying around when you leave, it gives us all a bad name and gives the antis more ammo. If there is brass and targets laying around from others, please clean it up too, it is in all our interest.